Question

when 1660 subjects were asked "on how many days in the past 7 days have you felt lonely" The mean was 1.4 and the standard deviation was 2.24. The margin of error for a 95% confidence interval for the population mean is 0.10

A) The confidence interval goes from _ to _

B) Which one is correct

* The interval contains the mean number of days that people have felt lonely in the last 7 days 95% of the time

* This is the interval containing all the possible values for the mean number of days that people have felt lonely in the past 7 days

* This is the interval containing the sample median number of days the subjects have felt lonely in the last 7 days

* This is the interval containing the most believable values for the mean number of days that people felt lonely in the last 7 days

Answer 1

solution:

Confidence interval for population mean is

- E < < +E

1.4 - 0.10 < < 1.4+ 0.10

1.3 < < 1.5

The confidence interval goes from 1.3 to 1.5

b) This is the interval containing all the possible values for the mean number of days that people have felt lonely in the past 7 days