Descriptive statistics worksheet with answers

Free printable Descriptive statistics worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy
51015202530

Find the mean x̄ of the data: 24, 19, 2, 30, 32, 13, 21.

n = 7
x̄ =
2.Easy
5101520253035

Find the median M of the data: 23, 25, 5, 12, 21, 36, 10, 5, 35.

n = 9
M =
3.Medium
35404550

Find the sample standard deviation s of the data: 43, 32, 41, 52, 53.

n = 5
s =
4.Medium
1520253035404550

Find the sample standard deviation s of the data: 54, 28, 12, 21, 48.

n = 5
s =
5.Hard
z −2−1012

A quantity is normally distributed with mean 500 and standard deviation 25. What proportion P of values is below 470?

μ = 500σ = 25x = 470
P =
6.Hard
z −2−1012

Exam scores are normally distributed with mean 170 and standard deviation 20. Find the z-score z of a score of 160.

μ = 170σ = 20x = 160
z =

Answer key

  1. 1. x̄ = 20.14
  2. 2. M = 21
  3. 3. s = 8.643
  4. 4. s = 17.85
  5. 5. P = 0.1151
  6. 6. z = −0.5

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