Six hundred consumers belonging to the 25-34 age group were ...

[craiczarry]

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.

[sabina576]

Answer to Question 1

.3608 to .4392

Answer to Question 2

35.94 to 44.06

[craiczarry]

Wow, this really help

[Liddy]

Great answer, keep it coming