In a Random Sample of 60 Dog Owners Enrolled in Obedience

question 4

Multiple Choice

In a random sample of 60 dog owners enrolled in obedience training, it was determined that the mean amountof money spent per owner was $109.33 per class. Assuming the population standard deviation of the amountspent per owner is $12, construct and interpret a 95% confidence interval for the mean amount spent per ownerfor an obedience class.

• A) \(( \$ 106.29 , \$ 112.37 )\); we are \(95 \%\) confident that the mean amount spent per dog owner for a single obedience class is between \(\$ 106.29\) and \(\$ 112.37\).
• B) \(( \$ 106.78 , \$ 111.88 )\); we are \(95 \%\) confident that the mean amount spent per dog owner for a single obedience class is between \(\$ 106.78\) and \(\$ 111.88\).
• C) (\$106.23, \$112.43); we are \(95 \%\) confident that the mean amount spent per dog owner for a single obedience class is between \(\$ 106.23\) and \(\$ 112.43\).
• D) \(( \$ 106.74 , \$ 111.92 )\); we are \(95 \%\) confident that the mean amount spent per dog owner for a single obedience class is between \(\$ 106.74\) and \(\$ 111.92\).

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