Question 11 4 points Save Answer A randoh sample of 250 students at a university

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Question 11 4 points Save Answer A randoh sample of 250 students at a university finds that these students take a mean of 143 credit hours per quarter with a standard deviation of 1.7 credit hours. The 95% confidence interval for the mean is 14.3 0.211. Give a practical interpretation of the interval. O 95% of the students take between 14.089 to 14.511 credit hours per quarter. we are 95% confident that the average number of credit hours per quarter of students at the universityfalls in the interval 14.089 to 14.511 hours. @ we are 95% confident that the average number of credit hours per quarter of the sampled students falls inthe interval 14.089 to 14.511 hours. The probability that a student takes 14.089 to 14.511 credit hours in a quarter is 0.95.

Explanation / Answer

The correct option is b.

After calculating mean of sample, we calculate confidence interval to check for whole population.

It tells us that with a certian level of confidence we can say that population mean will also lie in this range.

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