Question

A head librarian for a large city is looking at the overdue fees per user system-wide to determine if the library should extend its lending period. The average library user has \$19.67 in fees, with a standard deviation of \$7.02. The data is normally distributed and a sample of 72 library users is selected at random from the population. Select the expected mean and standard deviation of the sampling distribution from the options below.

Select all that apply:

σx¯=\$7.02

·

σx¯=\$0.10

·

σx¯=\$0.83

·

μx¯=\$0.27

·

μx¯=\$2.80

·

μx¯=\$19.67

Question

A family of statisticians is trying to decide if they can afford for their child to play youth baseball. The cost of joining a team is normally distributed with a mean of \$750 and a standard deviation of \$185. If a sample of 40 teams is selected at random from the population, select the expected mean and standard deviation of the sampling distribution below.

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