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STATS Learn 7 IA Problems

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Question;1. A recent study compared the time spend together by single- and dual-earner couples. According tothe records kept by the wives during the study, the mean amount of time spent together watchingtelevision among the single-earner couples was 61 minutes per day, with a standard deviation of15.5 minutes. For the dual-earner couples, the mean number of minutes spent watching televisionwas 48.4 minutes, with a standard deviation of 18.1 minutes. At the.01 significance level, can youconclude that the single-earner couples on average spend more time watching televisiontogether? There were 15 single-earner and 12 dual-earner couples studied.2. The null and alternate hypotheses are:A random sample of 20 items from the first population showed a mean of 100 and a standarddeviation of 15. A sample of 16 items for the second population showed a mean of 94 and astandard deviation of 8. Use the.05 significant level.3. The following hypotheses are given.A random sample of five observations from the first population resulted in a standard deviation of12. A random sample of seven observations from the second population showed a standarddeviation of 7. At the.01 significance level, is there more variation the first population?4.

 

Paper#61925 | Written in 18-Jul-2015

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