Intro to Stat_Part_45

# Intro to Stat_Part_45 - 149 Solutions to Exercises in...

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149 Solutions to Exercises in Chapter 9 Solution to Exercise 9.1 (p. 140) Complete solutions to all parts of this problem are available on the instructor’s website for this class. a. H o : μ = 34 ; H a : μ 6 = 34 c. H o : μ 100, 000 ; H a : μ < 100, 000 d. H o : p = 0.29 ; H a : p 6 = 0.29 g. H o : p = 0.50 ; H a : p 6 = 0.50 i. H o : p 0.11 ; H a : p < 0.11 Solution to Exercise 9.2 (p. 140) Complete solutions to all parts of this problem are available on the instructor’s website for this class. a. Type I error: We believe the average is not 34 years, when it really is 34 years. Type II error: We believe the average is 34 years, when it is not really 34 years. c. Type I error: We believe the average is less than \$100,000, when it really is at least \$100,000. Type II error: We believe the average is at least \$100,000, when it is really less than \$100,000. d. Type I error: We believe that the proportion of h.s. seniors who get drunk each month is not 29%, when it really is 29%. Type II error: We believe that 29% of h.s. seniors get drunk each month, when the proportion is really not 29%.

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