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
10152025303540

Find the mean x̄ of the data: 27, 11, 40, 31, 26, 6, 30, 21.

n = 8
x̄ =
2.Easy
101520253035

Find the mean x̄ of the data: 36, 22, 34, 17, 12, 7, 36, 36, 35.

n = 9
x̄ =
3.Medium
152025303540455055

Find the sample standard deviation s of the data: 12, 55, 26, 21, 46.

n = 5
s =
4.Medium
1520253035404550

Find the sample standard deviation s of the data: 50, 49, 18, 20, 44, 35, 11.

n = 7
s =
5.Hard
z −2−1012

Exam scores are normally distributed with mean 170 and standard deviation 15. Find the z-score z of a score of 200.

μ = 170σ = 15x = 200
z =
6.Hard
z −2−1012

A quantity is normally distributed with mean 100 and standard deviation 12. What proportion P of values is above 115?

μ = 100σ = 12x = 115
P =

Answer key

  1. 1. x̄ = 24
  2. 2. x̄ = 26.11
  3. 3. s = 17.9
  4. 4. s = 16.05
  5. 5. z = 2
  6. 6. P = 0.1056

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