Costco installs automobile tires on a first-come first-serve basis. the total time a customer needs to wait for the installation

Question

3 years ago

14

Costco installs automobile tires on a first-come first-serve basis. the total time a customer needs to wait for the installation

to be completed follows the normal distribution with a mean time of 106.3 minutes and a standard deviation of 18.5 minutes. the interval around the mean that contains 68% of the wait time for customers is ________.

Mathematics

1 answer:

Aleksandr-060686 [28] · Answer 1 · 2022-04-23T16:40:26+03:00

Aleksandr-060686 [28]3 years ago

3 0

The interval would be from 87.8 to 124.8.

68% of the data fall within one standard deviation of the mean, so we calculate

106.3 +/- 18.5:

106.3 - 18.5 = 87.8
106.3 + 18.5 = 124.8