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
5101520253035

Find the median M of the data: 21, 23, 9, 39, 11, 10, 12, 24, 2.

n = 9
M =
2.Easy
510152025

Find the median M of the data: 21, 25, 2, 7, 2, 6, 27, 28, 6, 7.

n = 10
M =
3.Medium
303540455055

Find the sample standard deviation s of the data: 31, 30, 59, 31, 36.

n = 5
s =
4.Medium
20253035404550

Find the sample standard deviation s of the data: 17, 16, 39, 25, 51.

n = 5
s =
5.Hard
z −2−1012

A quantity is normally distributed with mean 70 and standard deviation 12. What proportion P of values is below 58?

μ = 70σ = 12x = 58
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 154.

μ = 170σ = 20x = 154
z =

Answer key

  1. 1. M = 12
  2. 2. M = 7
  3. 3. s = 12.3
  4. 4. s = 15.09
  5. 5. P = 0.1587
  6. 6. z = −0.8

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