The cost of a meal for a sample of eight customers was recorded. The results (in Rands) were as follows:130.11, 129.85, 130.05, 128.53, 129.99, 129.85, 130.18, 129,98
a) Estimate a 90% confidence interval for the true average of cost of a meal. (3)
b) Calculate the length of the confidence interval. (1)
c) Provide the correct interpretation of the confidence interval you have calculated in a). (1)
1
Expert's answer
2021-10-14T10:49:17-0400
"(102.2,125)"
"125-102.2=22.8"
Average cost of food (in rand) is not less than 102.2 and not more than 125.
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
APPROVED BY CLIENTS
"assignmentexpert.com" is professional group of people in Math subjects! They did assignments in very high level of mathematical modelling in the best quality. Thanks a lot
Comments
Leave a comment