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
1015202530

Find the mean x̄ of the data: 28, 32, 15, 17, 32, 19, 7, 25.

n = 8
x̄ =
2.Easy
1015202530

Find the median M of the data: 33, 25, 9, 30, 32, 9, 31, 34, 9, 26.

n = 10
M =
3.Medium
152025303540455055

Find the sample standard deviation s of the data: 15, 29, 24, 52, 57, 26, 15.

n = 7
s =
4.Medium
101520253035404550

Find the sample standard deviation s of the data: 41, 50, 10, 20, 19, 30.

n = 6
s =
5.Hard
z −2−1012

Exam scores are normally distributed with mean 100 and standard deviation 10. Find the z-score z of a score of 90.

μ = 100σ = 10x = 90
z =
6.Hard
z −2−1012

A quantity is normally distributed with mean 500 and standard deviation 100. What proportion P of values is below 350?

μ = 500σ = 100x = 350
P =

Answer key

  1. 1. x̄ = 21.88
  2. 2. M = 28
  3. 3. s = 16.87
  4. 4. s = 15
  5. 5. z = −1
  6. 6. P = 0.06681

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