A Recent Study Compared the Time Spent Together by Single

question 65

Multiple Choice

A recent study compared the time spent together by single and dual-earner couples. According to the records kept during the study, the mean amount of time spent together watching TV among single-earner couples was 61 minutes per day, with a standard deviation of 15.5 minutes. For the dual-earner couples, the mean time was 48.4 and the standard deviation was 18.1. At a 0.01 significance level, can we conclude that the single-earner couples on average spend more time watching TV together? There were 15 single-earner and 12 dual-earner couples studied. State the decision rule, the value of the test statistic, and your decision.

• A) Reject if t > 2.485, t = 1.91, insufficient evidence to say that single-earner couples spend more time watching TV together.
• B) Reject if t > 2.485, t = 2.11, insufficient evidence to say that single-earner couples spend more time watching TV together.
• C) Reject if t > 2.473, t = 1.95, insufficient evidence to say that single-earner couples spend more time watching TV together.
• D) Reject if t > 2.473, t = 2.55, single-earner couples spend more time watching TV together.
• E) Reject if t > 2.485, t = 2.55, single-earner couples spend more time watching TV together.

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Definitions:

Commercial Advertisements

Marketing messages designed to inform or persuade the public to purchase products or services.

Credibility

The quality of being trusted and believed in, often relating to the reliability and validity of information or the integrity of individuals.

Window of Vulnerability

A critical period in which an individual is more susceptible to specific negative influences or harm, often due to transition or particular developmental stages.

Andrew Wakefield

A discredited former British doctor known for his fraudulent study suggesting a link between the MMR vaccine and autism, leading to a major public health scare.