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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.
36,755 Questions
How many equal groups of cards can be made from a standard deck of 52 cards?
52/1 = 52
52/2 = 26
52/4 = 13
52/13 = 4
52/26 = 2
52/52 = 1
6 groups. 1 group of 52 counts, right?
Cluster sampling is sampling technique that is used when natural groups are evident. In one-stage cluster sampling (Elementary Statistics, p. 24, by Triola), all members of these selected clusters are surveyed. Rigorous rules to define members of the cluster are needed. A member can not belong to two clusters. Surveys of people conducted in geographical different areas of the country would be an example of cluster sampling. Because different definitions/ explanations exist, I've included three links for further reading. See the following links: http://stattrek.com/Lesson6/CLS.aspx?Tutorial=Stat http://en.wikipedia.org/wiki/Cluster_sampling http://www.answers.com/topic/cluster-sampling
What is the advantage of a one-tailed test?
A one tailed test allows you to test a one-sided hypothesis.
The largest number you can form using all the digit with no repetitum?
How about 1 to the power 2 to the power 3 etc etc to the power 8 to the power 9?
Flip coin 50 times and toss number cube 5o times what is the probability.?
The question does not say which event the probability is required for!
Did all radii of a given circle are equal in length is this correct explain?
Yes, all radii of a given circle have the same length. A circle is defined as all the points on a plane that have a specified distance from a given point, called the center. Any segment from the center to the circle is called a radius (plural radii). Thus, by definition, all such segments (all radii) have the same length.
How you can indicate the current direction in the network?
If we go for the diagramatic representation then battery positive is represented by the long terminal and battery negative is represented by the short terminal then the direction of the current is given by an arrow from positive terminal to negative terminal
(Therotically electrons flow from negative to positive but we represent current flow from positive to negative. This is the sign convention )
How many possible outcomes are there rolling six sided cube twice?
- If each throw is unique, then there are 36 distinct outcomes(6 x 6 = 36).
- If each throw is not unique (you count 1-4 same as 4-1) then 21 different possible.
- If you're just interested in the sums, then 11 different possible (1+1 =2 up to 6+6=12)
But any time you want to calculate probabilities with two die throws, you need to use the 36 distinct outcomes.
How do you convert a z-score into an x-score?
Suppose m is the mean and s the standard deviation of a random variable, X, which is normally distributed. Then, given Z,
X = m + sZ
What are the odds of getting an even number on an eight sided die four times in a row?
One half, 1:2, 1/2, etc...
How many 5 digit numbers are there with distinct numbers?
I suspect you mean "without repeated digits", and I'll answer it that way.
Here's how I would construct all the 5-digit numbers without repeated digits:
The first digit can be any one of 9 (1 thru 9 but not zero). For each of these . . .
The second digit can be any one of 9 (zero thru 9 but not the same as the first one). For each of these . . .
The third digit can be any one of the remaining 8. For each of these . . .
The fourth digit can be any one of the remaining 7. For each of these . . .
The fifth digit can be any one of the remaining 6.
Total number of possibilities = (9 x 9 x 8 x 7 x 6) = 27,216
The random variable Z is the standard normal score. Find the number a if P Za equals 0.9830?
a = ±2.12, depending on the inequality for Z.
How many positive four digit numbers have 3 as their first digit and 4 or 5 as their third digit?
possibly than 20,
3040
3041 etc
3050
3051 etc
How do you find the answer to number 7 on the HSA Public Release 2009?
The answer is 363, but I don't know how to get that. Here is the question:
The table below shows the cubic relationship between xand y.
x y
1 1
2 8
3 27
4 64
5 125
6 216
7 ?
If this pattern continues, what is the value of y when x=7?
Which car will move first if their are 15 marbles while the other has 10 marbles?
I presume you mean they're on a slope. In which case, the car with the most marbles will move first, because it's heavier.
What is the median of 6.312.2 9.5 3.1 4.8?
The first "number" is 6.312.2 which, with two decimal points in it, must be a mistake.
How many times digit 1 is used to make all 2 digit numbers?
19 times
10,11 (is 2),12,13,14,15,16,17,18,19,21,31,41,51,61,71,81 and 91
How many numbers up to 100 have 1 in their units digit?
10.
They are 1, 11, 21, 31, 41, 51, 61, 71, 81, and 91.
What is the probabilty of 1 head and three tails?
1 in 16. You have 4 coins. The sample space is 16, i.e. 24.
