For the following scenarios provide the following for each scenario: • the null and alternative hypotheses • explain whether the hypothesis test is left-tailed, right-tailed, or two-tailed, • explain how you should interpret a decision that rejects the null hypothesis, and • explain how you should interpret a decision that fails to reject the null hypothesis. a. A Don Anderson Poll reports that on average 70% of Jamaicans believe that electricity bills are too high. b. Sunshine Cooperation guarantees that the mean shelf life of cornflakes is at least 750 days. c. Consumer Affairs has advised that the standard deviation of the fuel economies of its Honda Civics for 2016 is no more than 10.7 miles per gallon. d. A meal supplement provider claims that the average difference in calories between two brands is 55.
Question 1
For the following scenarios provide the following for each scenario:
• the null and alternative hypotheses
• explain whether the hypothesis test is left-tailed, right-tailed, or two-tailed,
• explain how you should interpret a decision that rejects the null hypothesis, and
• explain how you should interpret a decision that fails to reject the null hypothesis.
a. A Don Anderson Poll reports that on average 70% of Jamaicans believe that electricity
bills are too high.
b. Sunshine Cooperation guarantees that the
days.
c. Consumer Affairs has advised that the standard deviation of the fuel economies of its
Honda Civics for 2016 is no more than 10.7 miles per gallon.
d. A meal supplement provider claims that the average difference in calories between two
brands is 55.
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