Instruction 8-1
A random sample of 100 stores from a large chain of 1,000 garden supply stores was selected to determine the average number of lawnmowers sold at an end-of-season clearance sale. The sample results indicated an average of 6 and a standard deviation of 2 lawnmowers sold. A 95% confidence interval (5.623 to 6.377) was established based on these results.
-Referring to Instruction 8-1,of all possible samples of 100 stores taken from the population of 1,000 stores,95% of the confidence intervals developed will contain the true population mean within the interval.

Question

Quizplus · Accepted Answer

This statement is true according to the concept of confidence intervals. A 95% confidence interval means that if we were to draw 100 random samples (with replacement) from the population and calculate the confidence interval for each sample, about 95 of those intervals would contain the true population mean.

Instruction 8-1 A Random Sample of 100 Stores from a Large Chain