Following data are only a sample of number of cars rented daily: 3 2 4 2 5 4 2 6 1 Test the hypothesis Ho : µ> 4 cars rented daily. Use significance level is 5%. (33)
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- Morgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his firefighters receive at the state testing institute. Chief Pyro believes that these scores result because some firefighters are not in good physical condition. Pyro orders 75 randomly selected firefighters to participate in an hour of exercise per day. Another 200 firefighters have no required exercise. After 60 days, all firefighters are tested again by the state. Chief Pyro collects the data and performs a two-sample independent t-test by using SPSS to examine if there is a statistically significant difference between the treatment and control groups; the SPSS results are shown in the table below. Group Statistics Groups N Mean Std. Deviation Std. Error Mean Test Scores Treatment 75 74.5 31.4 3.6 Control 200 70.6 26.3 1.9 a. Formulate a null and research hypothesis: H0: H1: Collect all the necessary data: Mean score of the treatment group:…Morgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his firefighters receive at the state testing institute. Chief Pyro believes that these scores result because some firefighters are not in good physical condition. Pyro orders 75 randomly selected firefighters to participate in an hour of exercise per day. Another 200 firefighters have no required exercise. After 60 days, all firefighters are tested again by the state. Chief Pyro collects the data and performs a two-sample independent t-test by using SPSS to examine if there is a statistically significant difference between the treatment and control groups; the SPSS results are shown in the table below. Groups N Mean Std. Deviation Std. Error Mean Test Scores Treatment 75 74.5 31.4 3.6 Control 200 70.6 26.3 1.9 Formulate a null and research hypothesis: H0: H1: Collect all the necessary data: Mean score of the treatment group: Mean score of the control group: Sample size of the…Hypthesis testing In a 2011 National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults said that they had never consumed alcohol (USA TODAY, November 17, 2011). Suppose this result is true for the 2011 population of American adults. In a recent random sample of 2300 American adults, 35% said that they have never consumed alcohol. Using a 5% significance level, can you conclude that the current percentage of American adults who have never consumed alcohol is 33%?
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