Question

A supermarket selected a sample of 170 of its customers and measured how long they took to be served at the checkout counter. If too many customers wait too lone the supermarket intends to hire more checkout personnel. Specifically, the supermarket would like at least 85% of customers to be checked out in 8.5 minutes or less. From the data, the 90 and 60 percentiles were computed to be 8.6 minutes and 6.7 minutes, respectively. The range of the data was 14 minutes and the fastest anyone was checked out was 1.1 minutes. Step 3 of 5: Approximately how many customers waited 6.7 minutes or less to be checked out? Answer to Emer2 Points Keypad

Answer 1

Ans:

Given that

60th percentile,P₆₀=6.7 minutes

It means that 60% pf the customers checked out in 6.7 minutes or less.

So, number of customers waited 6.7 minutes or less to be checked out=170*0.6=102