An April 21, 2009, USA Today article titled “On road, it’s do as I say, not as I do” reported that 58% of U.S. adults speed up to beat a yellow light. Suppose you conduct a survey in your hometown of 150 randomly selected adults and find that 71 out of the 150 admit to speeding up to beat a yellow light. Does your hometown have a lower rate for speeding up to beat a yellow light than the nation as a whole? Use a 0.05 level of significance.
Answer to relevant QuestionsFind the values of t that bound the middle 0.95 of the distribution for df = 12. Using the computer output and information in Exercise 9.113, determine the value of the following: a. Hypothesized value of population proportion b. Sample proportion c. Test statistic Using the notation of Exercise 9.120, name and find the critical values of x2. State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test these claims: a. The variance has decreased from 34.5. b. The standard deviation of shoe size is more than 0.32. c. The ...A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 98.2 and the sample variance was s2 = 37.5 Does this sample show sufficient reason to conclude that the ...
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