Mathematics > EXAM > Statistics Fundamentals Unit 5 Challenge 2 with correct Answers (All)

Statistics Fundamentals Unit 5 Challenge 2 with correct Answers

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Statistics Fundamentals Unit 5 Challenge 2 with correct Answers.Peter wants to test an assumption on the number of trees that tested positive for a particular infestation. He decides to focus his eff ... orts on examining if more than 12% of trees have been infested. What should Peter state for the null hypothesis and alternative hypothesis?  a.) Null hypothesis: Alternative hypothesis:  b.) Null hypothesis: Alternative hypothesis:  c.) Null hypothesis: Alternative hypothesis:  d.) Null hypothesis: Alternative hypothesis:  d.)Correct. Since we are focusing on testing if the proportion of is greater than 12%, we can only reject the null hypothesis if the value is larger. This would be a one-tailed right test. So the null hypothesis and alternative hypothesis would be: Null hypothesis: p = 0.12 Alternative hypothesis: p > 0.12. A school counselor claims that the average number of sleep students get each night is 6 hours. A researcher has taken a well–designed survey and his sample mean is 8.5 hours and sample standard deviation is 0.25. The sample size is 400. Which statement is correct?  a.) [Show More]

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