s) Let 0 be a specifie value of t. Find 1o such that the following statement is
ID: 3059733 • Letter: S
Question
s) Let 0 be a specifie value of t. Find 1o such that the following statement is true Plt:")-05 where df-20. A)-2.861 B)2861 C)2.845 D)-2.845 32) 3) Fifteen SmartCars were randomly selected and the highway mileage of each was noted. The analysis yielded a mean of miles per gallon and a standard deviation of 5 miles per gallon. Which of the following would represent a interval for the average highway mileage of all SmartCars? 47 90% confidence 33) 5 5 15 B) 471.761 Vi5 C) 47+1345V15 15 A)47 ± 1753 D)47±1.645 34) We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation of 12 minutes. We want our 99 percent confidence interval to have a margin of error of no more than plus or minus 3 minutes. What is the smallest sample size that we should consider? 34) A) 11 B) 107 C)9 D) 319 35) How many tissues should a package of tissues contain? Researchers have determined that a person uses an average of st tissues during a cold. Suppose a random sample of 100 people yielded the following data on the number of tissues used during a cold: -17 suppose the corresponding test statistic falls in the rejection reghon at 05. What is the correct conclusion? 35) A) Ata 05, accepta C Ata 05, reject B) Ata - 10, reject Ha Ata-.10, reject HoExplanation / Answer
Solution:-
32) c) t0 = 2.845
P(t > t0) = 0.005, D.F = 20
p-value for the given condition = 1 - 0.005 = 0.995
tcritical = 2.845
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