Question

Working with the Concepts.

Answer 1

The standard deviation of the mileage for the sample of convertibles is 1.98977 miles.

What is standard deviation?

Standard deviation is used to determine how the values in a group differs from the mean of the values in the group. It is a measure of variation.

What is the standard deviation of the mileage?

In order to determine the standard deviation, take the following steps:

• Determine the mean of the observation:

(25 + 25 + 24 + 21 + 21 + 21 + 20) / 7 =22.43

• Determine the difference between each value and the mean and then square the result:

(25 - 22.43)² = 6.6049

(25 - 22.43)² = 6.6049

(24 - 22.43)² = 2.4649

(21 - 22.43)² = 2.0449

(21 - 22.43)² = 2.0449

(21 - 22.43)² = 2.0449

(20 - 22.43)² = 5.9049

Sum of squared difference = 27.7143

• Determine the mean of the square differences and then find the square root of the mean:

√27.7143 / 7 = 1.98977

To learn more about standard deviation, please check: brainly.com/question/12402189