Question

In the annual report, a major food chain stated that the distribution of daily sales at its detroit stores is known to be bell-shaped, and that 95 percent of all daily sales fell between $19,200 and $36,400. based on this information, what were the mean sales?

Answer 1

$27,800

Step-by-step explanation:

When a set of data is bell-shaped, the mean will be in the middle. A 95% confidence level means that $19,200 and $36,400 are located at 2 standard deviations from the mean. If you want to determine the mean, you have to add $19,200 + $36,400 = $55,600 and then divide by 2 = $27,800