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Author Question: Six hundred consumers belonging to the 25-34 age group were randomly selected in a city and were ... (Read 119 times)

craiczarry

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on: Aug 1, 2018
Six hundred consumers belonging to the 25-34 age group were randomly selected in a city and were asked whether they would like to purchase a domestic or a foreign automobile. Their responses are given below. Preference Frequency Domestic 240 Foreign 360 Develop a 95 confidence interval for the proportion of all such consumers who prefer to purchase domestic automobiles.

Question 2

A simple random sample of 36 items resulted in a sample mean of 40 and a standard deviation of 12 . Construct a 95 confidence interval for the population mean.


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sabina576

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Reply #1 on: Aug 1, 2018
Answer to Question 1

.3608 to .4392

Answer to Question 2

35.94 to 44.06


craiczarry

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Reply 2 on: Aug 1, 2018
Great answer, keep it coming :)

Joy Chen

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Reply 3 on: Yesterday
:D TYSM

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