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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 do you convert kilometer to feet?

Easy to do. One kilometer is equal to about 3,281 feet. So, use this formula: km x 3,281 = feet

How do you read a box plot?

You read it and select the folloeing answers.

What are all the values that mean x bar can possibly take?

It can take any value between the maximum and minimum observed values.

How To get valid results small samples are sufficient?

I will assume the sample is random. In general, the larger the sample, the smaller the percentage error will be (the difference between percentages in the sample, and the percentages in the universe from whence the sample is taken). The percentage error tends to go down as the square root of the size of the sample.

How many two-digit number contain the digit 2?

Let's count them out...

12

20

21

22

23

24

25

26

27

28

29

32

42

52

62

72

82

92

Whew... that makes 18 two-digit numbers that have a "2".

How do you find the mode?

The mode is the value that occurs most often. So just find what number appears the most and you have your mode. A good way to remember this is to think, mode = most.

18,24,24,26,30,30,30,38,44?

So in this case the mode is (30)

look at the figures the most comn figures will be the mode

e.g 10,13,14,8/10,10

the mode is 10

What does the spinney mean?

A spinney is a small wooded area or thicket of trees, shrubs, or bushes. It is a term often used to describe a small area of woodland or copse. Spinneys can provide a habitat for wildlife and can also be used for recreational purposes such as walking or birdwatching.

What does impounded mean?

Several meanings, related to the idea of "holding something in custody". Check the English Wiktionary for more details.

What can the difference between mean and median values infer. If the mean is 8 655.7 and the median -8 653.0?

First, I will give an example, similar to your question: -11000 -9000 +44000 mean = 8,000 and median = -9000. Symmetrical distributions after infinite sampling will show no difference in mean and median. Large differences are possible with small sample sizes even with symmetrical distributions. If the sample is large and the difference is large, this infers that the distribution is asymmetrical. The skewness of the distribution can be calculated.