I need the following answers solutions from the attached exercise which is Chapter # 10

Test of Hypothesis & Regression Analysis.

Books is Introduction to Statistics (3rd Edition) by Ronald E.Walpole_ for reference.

Test of Hypothesis

• All questions solve only by t distribution or F distribution
• In case you will not find the value of t-distribution or f-distribution in the table given in the book, then use Excel
• In all questions, perform for two tailed tests
• In all questions, 0.05 level of significance should be use (for t test only)
• In case of F-test, 0.01 level of significance should be use.

Question:

Page # 315-319 Question # 1, 2, 5, 8, 12, 14, 17, 20

Page # 324 Question # 9

1. An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with a mean of 800 hours and a standard deviation of 40 hours. Test the hypothesis that u = 800 hours against the alter- native u. # 800 hours if a random sample of 30 bulbs has an average life of 788 hours. Use a 0.04 level of significance. 2. In a research report by Richard H. Weindruch of the UCLA Medical School, it is claimed that mice with an average lifespan of 32 months will live to be about 40 months old when 40% of the calories in their food are replaced by vitamins and protein. Is there any reason to believe that u.