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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

Find the mean of the set of numbers 13 2 15 10 5?

The mean of a set of numbers is defined to be the quotient of the sum of all the numbers divided by how many numbers are summed. In this instance, (13 + 2 + 15 + 10 + 5)/5 = 9.

How many 8 number combinations are their using numbers 0 -9?

there are 10 numbers that you can choose from 0-9

you are choosing 8 at a time, meaning no repeats

so the answer is "10 choose 8"

or 10!/(8!*(8-2)!)

What would be the probable numbers when two dice are rolled?

is the dice weighed, if not, the probable is even for each number, if so, the number opposite of the weight is more probably going to land

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When two dice are rolled, 7 is the most probable total. If you count each die separately, there are 6 ways to roll a total of 7:

1 + 6;

2 + 5;

3 + 4;

4 + 3;

5 + 2;

6 + 1.

All the other totals have fewer possible ways to come up. For example, there is only one way to roll a 2 or a 12, two ways to roll a 3 or 11.

What do you mean by step and touch potential and it's standard value?

Step Potential is the potential Difference between two points on the earth's surface, separated by distance of one pace, that will be assumed to be one meter in the direction of maximum potential gradient (IS 3043) Touch Potential is the potential difference between a grounded metallic structure and a point on the earth's surface separated by a distance equal to the normal maximum horizontal reach, approximately one meter. (IS 3043)

What is the definition of height?

actually the skeletal bone is made of calcium,sort of osteoblasts & osteoclasts.

How do you round a decimal up or down?

Up if it is more than half, down if it is less than half. You round it off by omitting the decimal place. So .0234 becomes .023, and .0236 becomes .024.

What does the horizontal axis represent?

The horizontal axis usually represents the independent variable. One example is time. Time will change regardless of what problem you are analyzing with a graph. It could be seconds elapsed in a motion graph. Or it could be months, in a sales chart, for example. Distance could be another example of an independent variable. It just depends on what type of problem you are graphing.

What is the characteristic of chi square distribution?

Not sure if you want properties of chi-square distribution or the characteristic function. If it is the latter, see the last cell of the table with the equations labeled cf.

See related link.

What are all the multiples of 4 5 10?

There are an infinite number of them and so they cannot be listed.

Why is a median different from a mode?

Median is the middle of a set of numbers. The mode is the most common number to appear in a set of numbers.

This answer is true unlike most others on wikipedia.

What does it mean to say the difference between the means of group a and b is statistically significant?

There is an established statistical point for most comparisons or measurements that is so small that differences at or below it are considered to be "random", "predictable", or "meaningless". If a difference between A and B exceeds this point, it is said to be "significant", which does not necessarily mean "important" or "huge" - just "significant".

How many 3 digit numbers can be formed which are divisible by 5 using the digits 0 1 2 3 4 5 6 7 8 9 if repetitions of digits are allowed?

Ans is: 180

units place can filled in 2 ways

tens place can filled in 10 ways

hundreds place can filled in 9 ways

=2*10*9=180

What is errors of accidence?

Errors of accidence refers to a action, decision or inaction that leads to an accident.

Why do you need to divide by 2 when trying to find the median?

Because the median is the value which is half-way along the list of values in size order. Another way of describing "half" is "divide by two".