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Statistics

Statistics deals with collecting, organizing, and interpreting numerical data. An important aspect of statistics is the analysis of population characteristics inferred from sampling.

36,756 Questions

How much does a serum hcg quantitative test cost vs a qualitative?

test is to diagnose viability of pregnancy and site of pregnancy(up to some extent) its cost about 250 indian ruppes(5-6 US $) only.

What is the probability of rolling the following number situations with a single die a number less than 6?

Number of possible ways for one cube to fall = 6 .

Number of those possibilities that show a nmumbver less than 6 = 5 . (1, 2, 3, 4, and 5)

Probability of rolling a number less than 6 = 5/6 = 831/3 %

Does a symmetrical distribution have a variation?

Yes. The distribution can be compact (centred tightly around the mean) or spread out. It can have a peak in the centre or two peaks at each end, or other variations.

How many 4 digit numbers can be formed by the digits 2 4 6 8 once in each numeral?

This question can be answered regardless of what digits are used. If there are four options for the first digit, then there are only 3 options for the second digit, and 2 options for the third. There are no options left for the fourth and final digit. So, the answer is 4! (or four factorial).

Why are 1 3 4 6 7 and 10 key football numbers?

1 = Goalkeeper

3/4 = Central defenders

6/7 = Central midfielders

10 = Striker who generally plays in the middle.

How tall is 163 centimeters in feet?

5.35 ft

1 foot = 30.48 cm

163 cm = 163 cm * 1 ft/30.48 cm = 5.35 ft

Importance of quantitative techniques?

Quantitative techniques provide managers with concrete evidence and information, which allows them to make better decisions. Without quantitative techniques, managers would guess and risk assets of the business.

Disadvantages of sampling?

Sampling has several disadvantages. These include time consuming and tedious. Possibly, members of units are different from one another, thus decreasing its effectiveness.

What is an uncontrollable variable?

An uncontrolled variable is a characteristic that you allow to stay random during the sampling. For example, if you collect data on people of all eye colours, then eye colour is an uncontrolled variable.

How many 2 number combinations are there in the numbers 0 to 9?

100.

Don't forget the 00 combination. Otherwise think of all numbers between 1 and 99 with all single digits have a zero in the first column (e.g. 1 = 01)

* * * * *

No, that is the number of permutations! As far as combinations are concerned, 23 is the same as 32.

So, you have 10*9/2 = 45 combinations.

What is another way to describe the mean median and mode?

The Mean, Median and Mode are all different types of "Average".

Without qualification the word "Average" can be any of the three. This is often used deliberately where there can be a significant difference in the value of the different averages and a specific point wants to be made by the author - especially as most people think of "Average" as the "Mean average" because that is the first average that is encountered (just called the "average") and exclusively used until quite late in schooling. Most (proper) government statistics (for example census data) use the Median average.

Another misunderstanding most people have is that people see an average which they calculate as a Mean average, but then actually try to interpret it as a Median average. Usually the two are fairly close, but when the data is extremely skewed there can be a big difference which can lead to apparent nonsense which is actually true: for example it can be said that "the workers all earn below the average pay for the company" in a business where the workers are (poorly) paid (all the same) and the owner is paid many times the workers' pay (the owner is not counted among the "workers").

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The median is the middle number of any given set when they are in order, least to greatest. If there is an even number of values, the median is the mean average of the middle two.

Ex. (10, 17, 20, 45, 68)

The median is 20.

In any given set, the mode is the number that appears most often. If no number appears more frequently than any other, there is no mode.

Ex. (10, 17, 20, 45, 68)

This set has no mode.

In any given set, the mean is the total of the numbers divided by how many numbers there are.

Ex. (10, 17, 20, 45, 68)

68 + 45 + 20 + 17 + 10 = 160

There are 5 numbers in this set.

160/5 = 32

The mean is 32.

What does schmatta mean?

It's Yiddish for rags.

Schmatta (n.) Rags: Don't go out of the house wearing that schmatta.

How can you be sure of getting a 50 out of 50 ratio from flipping a coin?

You cannot because it is a random event. The whole point of it being a random event is that you can never be sure. The probability should get closer and closer to 50% as you increase the number of trials but there is no way to ensure certainty.