Question

An online store randomly samples three groups of 100 customers on which delivery method they use. The data shows the results of the three samples.

Overnight 2-Day Standard Total
Group 1 27 20 53 100
Group 2 32 17 51 100
Group 3 34 19 47 100



The online store has 2755 customers one day.

Based on the samples, what is a reasonable estimate of the number of people who will use overnight delivery?

Enter your answer rounded to the nearest whole number in the box.

Answer 1

The answer is 854 for sure. I did the test and got it all right.

Answer 2

854 customers.

Explanation:

An online store randomly samples three groups of 100 customers on which delivery method they use. The data shows the results of the three samples.

Overnight 2-day Standard Total

Group (1) 27 20 53 100

Group (2) 32 17 51 100

Group (3) 34 19 47 100

Total customers 93 56 151 300

We have to calculate the number of people who will use overnight delivery.

Out of 300 customer there are 93 people who would use overnight delivery, so the percentage =
`(93)/(300)` × 100 = 31%

The online store has 2755 customers one day.

Therefore, 31% of the 2755 customers =
`(31)/(2755)` × 100 = 854.05 ≈ 854 customers.

854 customers would use overnight delivery.