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
510152025

Find the median M of the data: 7, 21, 2, 21, 21, 29, 5, 29.

n = 8
M =
2.Easy
510152025303540

Find the mean x̄ of the data: 28, 8, 33, 40, 10, 38, 20, 6, 2.

n = 9
x̄ =
3.Medium
30354045505560

Find the sample standard deviation s of the data: 60, 50, 46, 35, 27, 27, 41.

n = 7
s =
4.Medium
2025303540455055

Find the sample standard deviation s of the data: 48, 55, 40, 17, 51, 55, 34.

n = 7
s =
5.Hard
z −2−1012

A quantity is normally distributed with mean 50 and standard deviation 5. What proportion P of values is below 47.5?

μ = 50σ = 5x = 47.5
P =
6.Hard
z −2−1012

A quantity is normally distributed with mean 50 and standard deviation 10. What proportion P of values is below 65?

μ = 50σ = 10x = 65
P =

Answer key

  1. 1. M = 21
  2. 2. x̄ = 20.56
  3. 3. s = 12.21
  4. 4. s = 13.8
  5. 5. P = 0.3085
  6. 6. P = 0.9332

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