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,if the population had consisted of 10,000 stores,the confidence interval estimate of the mean would have been wider in range.

Question

Quizplus · Accepted Answer

The size of the population does not affect the width of the confidence interval when the sample size remains constant; the confidence interval's width is determined by the sample size, the standard deviation of the sample, and the desired level of confidence, not the size of the population.

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