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: 28, 26, 18, 10, 35, 12, 38.

n = 7
M =
2.Easy
51015202530

Find the mean x̄ of the data: 30, 4, 33, 17, 7, 34.

n = 6
x̄ =
3.Medium
152025303540455055

Find the sample standard deviation s of the data: 39, 49, 22, 15, 57.

n = 5
s =
4.Medium
202530354045

Find the sample standard deviation s of the data: 44, 19, 45, 37, 20, 25.

n = 6
s =
5.Hard
z −2−1012

A quantity is normally distributed with mean 500 and standard deviation 50. What proportion P of values is above 450?

μ = 500σ = 50x = 450
P =
6.Hard
z −2−1012

Exam scores are normally distributed with mean 100 and standard deviation 15. Find the z-score z of a score of 88.

μ = 100σ = 15x = 88
z =

Answer key

  1. 1. M = 26
  2. 2. x̄ = 20.83
  3. 3. s = 17.71
  4. 4. s = 11.83
  5. 5. P = 0.8413
  6. 6. z = −0.8

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