H0 x 15 days Ha x 15 days In planning a study on the num
H0 : x = 15 days
Ha : x > 15 days
| In planning a study on the number of days in the last 30 that high school students texted while driving sometime during the day, a researcher states the hypotheses as H0 : x = 15 days | |||||||
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Solution
Hypotheses are statements about parameters, not statistics. The research question is not about the sample mean (x), but should be about the population mean, .
Therefore, correct hypothesis should be:
H0 : = 15 days
Ha : > 15 days
The correct answer is: A
