Question

3. To estimate likely expenditure by customers at a new supermarket, a sample of till slips from a similar supermarket describing the weekly amounts spent by 600 randomly selected customers was analyzed. These data were found to be approximately normally distributed with a mean of £60 and a standard deviation of £20. Using this knowledge find the following information for shoppers at the new supermarket: (12 Marks) i. The value below which: a. 60% of the customers are expected to spend, b. 55% of the customers are expected to spend. ii. The value expected to be exceeded by: a. 15% of the customers, b. 75% of the customers iii. The value below which: a. 450 of the shoppers are expected to spend. b. 150 of the shoppers are expected to spend

Answer 1

Answer:

you have to divide 450×150 then what you gave the answer then divide that number to 45%