For the following scenarios, identify the variable being compared between groups Identify the two populations (i.e. the two groups) determine the null and research hypotheses (use words and statistical notation) classify the hypothesis test as two tailed, lower tailed, or upper tailed #1 Data on household vehicle miles of travel (VMT) are compiled annually by the Federal Highway Administration. A hypothesis test is to be performed to decide whether a difference exists in last year's mean VMT for households in the Midwest and South. #2 Television commercials are becoming increasingly important and prevalent in presidential elections. A study by D. Lowry and M. Naser examined whether rhetoric in presidential TV commercials is different between the winners and losers.
For the following scenarios,
identify the variable being compared between groups
Identify the two populations (i.e. the two groups)
determine the null and research hypotheses (use words and statistical notation)
classify the hypothesis test as two tailed, lower tailed, or upper tailed
#1 Data on household vehicle miles of travel (VMT) are compiled annually by the Federal Highway Administration. A hypothesis test is to be performed to decide whether a difference exists in last year's mean VMT for households in the Midwest and South.
#2 Television commercials are becoming increasingly important and prevalent in presidential elections. A study by D. Lowry and M. Naser examined whether rhetoric in presidential TV commercials is different between the winners and losers. The researchers published their results in the article "From Eisenhower to Obama: Lexical Characteristics of Winning versus Losing Presidential Campaign Commercials". A hypothesis test was conducted to see whether, on average, the loser's TV-commercial rhetoric was more frequent on terms that were self-related ("I/me/my" words) than that of the winner's commercials.
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