Suppose the average amount spent per shopper at the Super Fresh Grocery Store last month was
$46.10. A sample of 25 transactions from last month was randomly selected. Another random sample of 50 transactions was also collected. We can be certain that the sampling error from the sample of 50 customers will be less than the sampling error from the 25 customers.

Question

Quizplus · Accepted Answer

Sampling error decreases as sample size increases, but we cannot be certain without knowing the variability of the population and assuming the samples are representative.

Suppose the Average Amount Spent Per Shopper at the Super