OpenStax, Introductory Statistics 2e §8.1 A Single Population Mean using the Normal Distribution · Exercise 7 · Statistics · Normal distribution
A Single Population Mean using the Normal Distribution · Exercise 7
The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people. The sample mean is 8.2 minutes. There is a known standard deviation of 2.2 minutes. The population distribution is assumed to be normal.
In words, define the random variables X and .
OpenStax, Introductory Statistics 2e · §8.1 A Single Population Mean using the Normal Distribution · Exercise 7
Stuck? A gentle nudge
No hints for this one.
Your working
Check your full solution
Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.