Classify the variable below in each of the following categories: the cholesterol levels of a group of adults the day after Thanksgiving a) qualitative or quantitative: [parta]b) discrete, continuous, or neither: [partb]c) nominal, ordinal, interval, or ratio level of measurement: [partc]
Read DetailsA recent survey showed that in a sample of 100 elementary school teachers, 15 were single. In a sample of 180 high school teachers, 36 were single. Is the proportion of elementary school teachers who were single less than the proportion of high school teachers who were single? Use α = 0.01. H0:
Read DetailsA local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.2 minutes with a standard deviation of 0.8 minute. If α = 0.10, test the store’s claim. H0: = 3.5 Ha: [response1] Test statistic: [response2] p-Value = [response3] Decision: [response4] Conclusion: There [response5] sufficient evidence to support the conclusion that the mean waiting time at this hardware store is [response6] than 3.5 minutes.
Read DetailsA recent study claimed that 15% of junior high students are overweight. In a sample of 160 students, 18 were found to be overweight. At α = 0.05, decide if this sample gives evidence that the proportion of overweight junior high students is actually different from 15%. H0: p [response0] 0.15 Ha: p [response1] Test statistic: [response2] p-Value = [response3] Decision: [response4] Conclusion: There [response5] sufficient evidence to support the conclusion that the percentage of junior high students is [response6] than 15%.
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