SOLUTION: a survey of 97 randomly selected homeowners found the the mean amount spent on lawn service was $720 per year. construct a 98% confidence interval for the mean amount of money spen
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Question 1102141: a survey of 97 randomly selected homeowners found the the mean amount spent on lawn service was $720 per year. construct a 98% confidence interval for the mean amount of money spent on lawn service per household per year. assume the population standard deviation was $123 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a survey of 97 randomly selected homeowners found the the mean amount spent on lawn service was $720 per year. construct a 98% confidence interval for the mean amount of money spent on lawn service per household per year. assume the population standard deviation was $123
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sample mean = $720
ME = 2.3263*123/sqrt(97) = 29.05
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98% CI:: 720-29.05 < u < 720+29.05
98% CI:: 690.95 < u < 749.05
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Cheers,
Stan H.
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