The owner of a restaurant is reviewing customer complaints. in a random sample of 227 complaints, 57 complaints were about the slow speed of the service. create a 95% confidence interval for the proportion of complaints that were about the slow speed of the service. use excel to create the confidence interval, rounding to four decimal places.

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Step-by-step explanation:

Given :The owner of a restaurant is reviewing customer complaints. In a random sample of 227 complaints, 57 complaints were about the slow speed of the service.

To Find :Create a 95% confidence interval for the proportion of complaints that were about the slow speed of the service.

Solution:

n = 227

x = 57

Formula of confidence for proportion: to  

z at 95% is 1.96

Substitute the values in the formula :

Confidence for proportion: to

Confidence for proportion: to

Hence 95% confidence interval for the proportion of complaints that were about the slow speed of the service is   to

-1, -2, -3, -4, -6

step-by-step explanation:

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right