Question

A toy factory makes 5,000 teddy bears per day. The supervisor randomly selects 10 teddy bears from all 5,000 teddy bears and uses this sample to estimate the mean weight of teddy bears and the sample standard deviation. How many degrees of freedom are there in the estimate of the standard deviation?

Answer 1

4 days

Explanation:

A toy factory makes 25 teddy bears every 10 minutes. The factory makes teddy bears for 12 hours each work day. What is the fewest number of work days the factory will need to make 7,200 teddy bears? Write an explanation to show how you determined your answer.

Answer 2

9

Explanation:

Degrees of freedom is the number of values in the final calculation of a statistic that are free to vary. Degrees of freedom are related to sample size and calculated by n-1 where n is the sample size.

The Supervisor selects 10 teddy bears as sample from 5000 teddy bears produced daily. Therefore in this situation, there are 10-1=9 degrees of freedom