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
101520253035

Find the median M of the data: 24, 10, 26, 25, 7, 6, 37, 28, 9, 38.

n = 10
M =
2.Easy
51015202530

Find the mean x̄ of the data: 3, 28, 7, 8, 15, 34, 34.

n = 7
x̄ =
3.Medium
202530354045

Find the sample standard deviation s of the data: 17, 19, 37, 21, 48.

n = 5
s =
4.Medium
101520253035404550

Find the sample standard deviation s of the data: 15, 10, 26, 22, 53.

n = 5
s =
5.Hard
z −2−1012

A quantity is normally distributed with mean 60 and standard deviation 10. What proportion P of values is above 45?

μ = 60σ = 10x = 45
P =
6.Hard
z −2−1012

Exam scores are normally distributed with mean 50 and standard deviation 20. Find the z-score z of a score of 90.

μ = 50σ = 20x = 90
z =

Answer key

  1. 1. M = 24.5
  2. 2. x̄ = 18.43
  3. 3. s = 13.52
  4. 4. s = 16.72
  5. 5. P = 0.9332
  6. 6. z = 2

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