You measure 47 textbooks and find they have a mean weight of 50 ounces. Assume the population standard deviation is 10.4 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Give your answer as decimals, to 2 places.
When we are given the true parameters of the population distribution, that is, the true mean and variance of the whole of the population, then we can apply the z critical value corresponding to the normal distribution for finding the confidence interval.
Answer and Explanation:
The confidence interval for the true population mean of the mean textbook weight is given by:
See full answer below.
Become a member and unlock all Study Answers
Try it risk-free for 30 daysTry it risk-free
Ask a question
Our experts can answer your tough homework and study questions.Ask a question Ask a question
Learn more about this topic:
fromChapter 9 / Lesson 3