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Standardized Tests
Tests that are administered under controlled conditions are called standardized tests. They are used to measure IQ, determine how much a child has learned, and in a number of other ways. Whether your question is about standardized tests in general or a specific test, you can ask it here!
605 Questions
Who are the 4 great mathematicians?
Leonhard Euler, Jacob Jacobi, Srinivasa Ramanujan and Carl Gauss.
If the joint probability distribution of X and Y is given by?
(i) P(X <= 2, Y = 1) = P(X=0, Y=1) + P(X=1, Y=1) + P(X=2, Y=1)
= (0+1)/30 + (1+1)/30 + (2+1)/30 = 6/30 = 1/5.
(ii) P(X + Y = 4) = P(X=2, Y=2) + P(X=3, Y=1)
= (2+2)/30 + (3+1)/30 = 8/30 = 4/15.
Why do asians score higher than Americans?
Standardized tests are sometimes biased but when comparing country scores we need to take into account that USA tries to educate every child and does not have ability tracking. First year immigrants to the US have higher scores because of motivation and lack of distractions.
What are examples of parametric and nonparametric statistical tests?
Parametric statistical tests assume that your data are normally distributed (follow a classic bell-shaped curve). An example of a parametric statistical test is the Student's t-test.
Non-parametric tests make no such assumption. An example of a non-parametric statistical test is the Sign Test.
Open ended question and closed ended question as used in decision making?
A closed question is when the answer can only be Yes/No. Or when you have a predefined list of answers to choose from. An open ended question let's you answer with your own words.
How do you figure out the area of a room?
room is in cuboid shape, so by calculating length(L),breadth(B),height(H)
we can find area by formula AREA=L*B*H
Data in order from smallest to largest or visa versa?
I'll give this a go...
A nibble
A byte
A Bit
A megabyte
A gigabyte
A Terabyte
An Exabyte
is that what you were looking for?
THE CORRECT ANSWER IS RANKING ORDER
What are the merits and demerits of mean median and mode?
MERITS OF ARITHEMETIC MEAN
l ARITHEMETIC MEAN RIGIDLY DEFINED BY ALGEBRIC FORMULA
l It is easy to calculate and simple to understand
l IT BASED ON ALL OBSERVATIONS AND IT CAN BE REGARDED AS REPRESENTATIVE OF THE GIVEN DATA
l It is capable of being treated mathematically and hence it is widely used in statistical analysis.
l Arithmetic mean can be computed even if the detailed distribution is not known but some of the observation and number of the observation are known.
l It is least affected by the fluctuation of sampling
DEMERITS OF ARITHMETIC MEAN
l It can neither be determined by inspection or by graphical location
l Arithmetic mean cannot be computed for qualitative data like data on intelligence honesty and smoking habit etc
l It is too much affected by extreme observations and hence it is not adequately represent data consisting of some extreme point
l Arithmetic mean cannot be computed when class intervals have open ends
Median:
The median is that value of the series which divides the group into two equal parts, one part comprising all values greater than the median value and the other part comprising all the values smaller than the median value.
Merits of median
Merits of median
(1) Simplicity:- It is very simple measure of the central tendency of the series. I the case of simple statistical series, just a glance at the data is enough to locate the median value.
(2) Free from the effect of extreme values: -Unlike arithmetic mean, median value is not destroyed by the extreme values of the series.
(3) Certainty: - Certainty is another merits is the median. Median values are always a certain specific value in the series.
(4) Real value: - Median value is real value and is a better representative value of the series compared to arithmetic mean average, the value of which may not exist in the series at all.
(5) Graphic presentation: - Besides algebraic approach, the median value can be estimated also through the graphic presentation of data.
(6) Possible even when data is incomplete: - Median can be estimated even in the case of certain incomplete series. It is enough if one knows the number of items and the middle item of the series.
Demerits of median:
Following are the various demerits of median:
(1) Lack of representative character: - Median fails to be a representative measure in case of such series the different values of which are wide apart from each other. Also, median is of limited representative character as it is not based on all the items in the series.
(2) Unrealistic:- When the median is located somewhere between the two middle values, it remains only an approximate measure, not a precise value.
(3) Lack of algebraic treatment: - Arithmetic mean is capable of further algebraic treatment, but median is not. For example, multiplying the median with the number of items in the series will not give us the sum total of the values of the series.
However, median is quite a simple method finding an average of a series. It is quite a commonly used measure in the case of such series which are related to qualitative observation as and health of the student.
Mode:
The value of the variable which occurs most frequently in a distribution is called the mode. Merits of mode:
Following are the various merits of mode:
(1) Simple and popular: - Mode is very simple measure of central tendency. Sometimes, just at the series is enough to locate the model value. Because of its simplicity, it s a very popular measure of the central tendency.
(2) Less effect of marginal values: - Compared top mean, mode is less affected by marginal values in the series. Mode is determined only by the value with highest frequencies.
(3) Graphic presentation:- Mode can be located graphically, with the help of histogram.
(4) Best representative: - Mode is that value which occurs most frequently in the series. Accordingly, mode is the best representative value of the series.
(5) No need of knowing all the items or frequencies: - The calculation of mode does not require knowledge of all the items and frequencies of a distribution. In simple series, it is enough if one knows the items with highest frequencies in the distribution.
Demerits of mode:
Following are the various demerits of mode:
(1) Uncertain and vague: - Mode is an uncertain and vague measure of the central tendency.
(2) Not capable of algebraic treatment: - Unlike mean, mode is not capable of further algebraic treatment.
(3) Difficult: - With frequencies of all items are identical, it is difficult to identify the modal value.
(4) Complex procedure of grouping:- Calculation of mode involves cumbersome procedure of grouping the data. If the extent of grouping changes there will be a change in the model value.
(5) Ignores extreme marginal frequencies:- It ignores extreme marginal frequencies. To that extent model value is not a representative value of all the items in a series.
Besides, one can question the representative character of the model value as its calculation does not involve all items of the series.
"about 300.00 american"
i am getting the ruger 9mm p89 with 3 mags, holster, case, cleaning supplies, and ammo for that price...
Who can answer these economic questions I posted in the comments?
Here is full questions. Please help. 1) Which of these is an economic indicator used to tell how an economy is doing? A) Equilibrium Price B) Consumer Price Index C) Job Satisfaction Rate D) Presidential Approval Rate
2) The nation of Swampastan produces only two goods, chips and dip. Calculate the GDP for Swampastan if dip retails for $3.00 a pound and 10 pounds are produced while chips sell for $2.00 a pound and 20 pounds are produced. A) $1,200.00 B) $150.00 C) $30.00 D) $70.00
3) Which of these is an indicator of increased economic growth in a nation? A) increased job satisfaction B) increased aggregate demand C) increased welfare applications D) increased transfer payments by the government
4) Over a three year period, the United States experienced an increase in the real GDP, low inflation, and a declining unemployment rate. For this period, the United States A) was in an economic trough. B) was in a stagnant economic period. C) appeared to be entering a recession. D) was in the middle of an economic boom.
5) Inflation is defined as a rise in the general level of prices. When inflation occurs, the buying power of the dollar would A) increase. B) decrease. C) remain stable. D) not be affected by inflation.
6) Help Wanted Ads Established company seeking full-time residential house cleaner. We will train. Must be honest and dependable. Call (123) 456-7890. Suburban medical facility seeking surgeon. Board Certified required. $1,000 signing bonus for every year of experience, up to $15,000. Send resume to 123 Medical Drive, Suburbia, GA. Temporary lifeguard needed to fill summer holiday shifts at outdoor swimming pool. Must have CPR and lifeguard certification. Apply in person to Bridgefront, 123 Bridgefront, Anytown, GA. Aircraft manufacturer seeking engineers with advanced degree in physics and no less than 15 years experience. Many positions available. Send resume to 123 Aircraft Blvd., Anytown, GA. According to the passage, the aircraft manufacturer has many positions available that remain unfilled due to lack of qualified applicants. This is an example of A) cyclical unemployment. B) temporary unemployment. C) structural unemployment. D) frictional unemployment.
7) Help Wanted Sales Position: Self-Motivated individual needed to sell new homes being built in the Lakefront area. Salary based on commission and experience. Kris applies for the sales position and does well. However, she is laid off in late October due to slow sales. This is an example of what type of unemployment? A) cyclical B) frictional C) organizational D) structural
8) A technology company needs 10 workers experienced in a newly developed programming language. Plenty of applicants express interest in the job; however, only three have the necessary education and experience to complete the work. The remaining unemployed individuals are an example of ___ unemployment. A) cyclical B) frictional C) seasonal D) structural
9) While inflation is a rise in the general level of prices, economic growth is a A) short period during which the nation's total output of goods and services decreases. B) short period during which the nation's total output of goods and services increases. C) sustained period during which the nation's total output of goods and services decreases. D) sustained period during which the nation's total output of goods and services increases.
10) The unemployment rate is usually calculated as the number of unemployed individuals A) divided by the total number of people in a society. B) multiplied by the total number of people in a society. C) divided by the total number of people in a labor force. D) multiplied by the total number of people in a labor force.
11) According to the information, if the shaded areas indicate a recession, unemployment rates A) fall during economic recessions. B) rise during economic recessions. C) rise during economic recovery periods. D) fall during economic recovery periods.
12) The growth rate in the fourth quarter of 2010 was 3.1%. What was the growth rate in the first quarter of 2011? A) -3% B) 1.2% C) 1.9% D) 5%
13) Which of these statements BEST describes the amount of money invested in government fixed assets from 2002 through 2009? A) The amount steadily grew. B) The amount stayed the same. C) The amount steadily decreased. D) The amount fluctuated up and down.
14) Which of these is the BEST definition of GDP? A) a description of the quality of life in a nation B) average value of production of intermediate goods C) a collection of all government assets that could earn money D) market value of all goods and services produced in a country
15) An increase in Americans buying imported goods would result in A) no change in the GDP. B) a decrease in the GDP. C) an increase in the GDP. D) a severely damaged GDP.
16) "Too much money chasing too few goods" is a common way use to describe what economic concept? A) bankruptcy B) depression C) inflation D) recession
17) Which would be the appropriate monetary policy and goal during a period of high inflation? A) Increase interest rates in order to increase the money supply. B) Decrease interest rates in order to decrease the money supply. C) Increase interest rates in order to decrease the money supply. D) Decrease interest rates in order to increase the money supply.
18) During a recession, what must happen to interest rates to spur economic growth? A) drop B) increase C) remain stable D) increase and decrease
19) One way that individuals try to protect themselves against the possibility of becoming unemployed is by maintaining an emergency fund, usually in a very liquid state, such as a savings account. How is such a fund threatened, if unemployment is accompanied by high inflation? A) Inflation reduces the purchasing power of the money in the emergency funds. B) Banks may lower their interest rates so much that the emergency accounts will earn very little. C) Due to bank failures, emergency funds may not be available for withdrawal as quickly as they are needed. D) People may be tempted to use their emergency funds for additional job training to become more employable.
20) If the Midwestern states experienced a wide-scale and prolonged drought, we could expect corn prices to rise sharply. This would be an example of A) cost-push inflation. B) cost-pull inflation. C) demand-push inflation. D) demand-pull inflation.
21) A common criticism of GDP as an economic welfare measure is that it excludes A) the dollar value of net exports. B) the dollar value of happiness levels. C) the dollar value of final goods produced. D) the dollar value of final services produced.
22) On the news you hear that business investment has increased from last year to this year. All else equal, the most likely result is A) higher inflation. B) increased economic growth. C) a general decline in the price level, due to increased productivity. D) the increased capital stock will replace workers, thus increasing unemployment.
23) GDP = consumer spending + government spending + investment + net exports A U.S. business buys new computers for its office workers from a U.S. computer manufacturer. The value of transaction would be included in which category of GDP? A) net exports B) consumer spending C) business investment D) government spending
24) In the business cycle, what always follows immediately after a contraction? A) depression B) expansion C) recession D) trough
25) Town of Coffeeville Total Population: 225,000 Working Age Population: 144,000 Employed: 124,000 Unemployed: 20,000 What is the unemployment rate of Coffeeville? A) 2% B) 7.2% Eliminate C) 13.8% D) 20%
What are some examples of univariate vs bivariate?
Univariate involves a single variable. Bivariate involves two variables. Univariate: How many of students in the senior class are male? Bivariate: Is there a relationship between girls taking Technology Class and their mathematics scores?
The reactance of a capacitor is proportional to?
inverse of frequency
AnswerReactance is inversely-proportional to frequency of the supply, and the capacitance of the capacitor.
What is the difference between parametric and non parametric?
Nonparametric tests are sometimes called distribution free statistics because they do not require that the data fit a normal distribution. Nonparametric tests require less restrictive assumptions about the data than parametric restrictions. We can perform the analysis of categorical and rank data using nonparametric tests.
Does personality include cognitive abilities?
My undergraduate degree is in psychology, however I am not a psychologist. That being said, let us first take a look at the definition of "cognition." Cognition involves the mental process of knowing, including aspects such as awareness, perception, reasoning, and judgment. To answer your question, yes human personality does involve cognitive abilities. Still, if you ask what makes up personality in sum, then I would say that personality is the combination of many components, and there are many schools of thought. Hopefully, some one will add to this who has the ability to explain an enormous subject without writing a book on this site. Personality is a life-long learning process and it would still be only the tip of the iceberg. Viper1
Why is lead pencil good for marking electronically scanned test papers or ballots?
The graphite is reflective to the electronic beam.
