Business, 19.04.2021 18:30 Jaaaack

The manager of John’s supermarket received complaints from Cashiers at the supermarket that many customers who used the express check-out lane have
more than the stipulated number of items for the lane. The express check-out
lanes are limited to customers purchasing 10 or fewer items. A recently taken
random sample of 150 customers entering express lanes at this supermarket
found that 84 of them had more than 10 items.
a. What is the point estimate of the mean number of customers who enter
the express lanes with more than 10 items? (2 mark)
b. Construct a 99% confidence interval for the percentage of all customers
at this supermarket who enter express lanes with more than 10 items (6
marks)
c. What does the 99% confidence interval mean from part (b)? (2 marks)

Answers: 1

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