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
1520253035

Find the mean x̄ of the data: 35, 24, 38, 19, 31, 23, 18, 13, 29.

n = 9
x̄ =
2.Easy
10152025303540

Find the median M of the data: 27, 29, 40, 38, 12, 20, 7, 36.

n = 8
M =
3.Medium
30354045505560

Find the sample standard deviation s of the data: 60, 59, 37, 44, 51, 50, 27.

n = 7
s =
4.Medium
253035404550

Find the sample standard deviation s of the data: 54, 37, 37, 42, 23.

n = 5
s =
5.Hard
z −2−1012

Exam scores are normally distributed with mean 50 and standard deviation 8. Find the z-score z of a score of 54.8.

μ = 50σ = 8x = 54.8
z =
6.Hard
z −2−1012

Exam scores are normally distributed with mean 500 and standard deviation 25. Find the z-score z of a score of 462.5.

μ = 500σ = 25x = 462.5
z =

Answer key

  1. 1. x̄ = 25.56
  2. 2. M = 28
  3. 3. s = 11.88
  4. 4. s = 11.15
  5. 5. z = 0.6
  6. 6. z = −1.5

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