Young children require a lot of time. This time commitment cuts into a parent’s leisure time. A sociologist wanted to estimate the difference in the amount of daily leisure time (in hours) of adults who do not have children under the age of 18 years and the amount of daily leisure time (in hours) of adults who have children under the age of 18 years. A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.62 hours, with a standard deviation of 2.43 hours. A random sample of 40 adults with children under the age of 18 years results in a mean daily leisure time of 4.10 hours, with a standard deviation of 1.82 hours. Construct and interpret a 90% conﬁdence interval for the mean difference in leisure time between adults with no children and adults with children.
Answer to relevant QuestionsExplain the steps in designing an experiment. The aluminum bottle, ﬁrst introduced in 1991 by CCL Container for mainly personal and household items such as lotions, has become popular with beverage manufacturers. Besides being lightweight and requiring less packaging, ...A researcher wanted to determine the effectiveness of a new cream in the treatment of warts. She identiﬁed 138 individuals who had two warts. She applied cream A on one wart and cream B on the second wart. Test whether the ...Conduct the appropriate test to determine if the population proportions for the two treatments differ at the α = 0.05 level of signiﬁcance. Perform the appropriate hypothesis test. In a study published in the journal Teaching of Psychology, the article “Fudging the Numbers: Distributing Chocolate Inﬂuences Student Evaluations of an Undergraduate Course” states that distributing chocolate to ...
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