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: 28, 26, 33, 4, 22, 30.

n = 6
x̄ =
2.Easy
101520253035

Find the median M of the data: 27, 7, 15, 24, 34, 30, 35.

n = 7
M =
3.Medium
222426283032343638

Find the sample standard deviation s of the data: 26, 22, 21, 30, 22, 38.

n = 6
s =
4.Medium
22242628303234363840

Find the sample standard deviation s of the data: 21, 25, 40, 34, 40, 37.

n = 6
s =
5.Hard
z −2−1012

Exam scores are normally distributed with mean 70 and standard deviation 8. Find the z-score z of a score of 63.6.

μ = 70σ = 8x = 63.6
z =
6.Hard
z −2−1012

Exam scores are normally distributed with mean 500 and standard deviation 40. Find the z-score z of a score of 452.

μ = 500σ = 40x = 452
z =

Answer key

  1. 1. x̄ = 23.83
  2. 2. M = 27
  3. 3. s = 6.565
  4. 4. s = 8.035
  5. 5. z = −0.8
  6. 6. z = −1.2

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