A Recent Study Compared the Time Spent Together by Single

question 5

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 55 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 12 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 = 2.57, insufficient evidence to say that single-earner couples spend more time watching TV together.
• B) Reject if t > 2.508, t = 0.96, insufficient evidence to say that single-earner couples spend more time watching TV together.
• C) Reject if t > 2.473, t = 2.57, single-earner couples spend more time watching TV together.
• D) Reject if t > 2.508, t = 0.96, single-earner couples spend more time watching TV together.
• E) Reject if t > 2.485, t = 2.01, single-earner couples spend more time watching TV together.

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Definitions:

Alcohol

A colorless volatile flammable liquid, chemically a compound of hydrogen, oxygen, and carbon, that is the intoxicating component of wine, beer, spirits, and other drinks.

Attribution

The process of explaining one's own behavior and the behavior of others.

Aggress

To act with hostility or initiate an attack against others.

Unintentional

Actions or behaviors that occur without deliberate planning or intent.