Mathematics, 14.02.2022 16:30, wiljoystoltz253
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card. You are given the following information.
Store's Card
Major Credit Card
Sample size
64
49
Sample mean
$140
$125
Population standard deviation
$10
$8
A point estimate for the difference between the mean purchases of all users of the two credit cards is?
At 95% confidence, the margin of error is?
A 95% confidence interval estimate for the difference between the average purchases of all customers using the two different credit cards is?
Answers: 1
Mathematics, 21.06.2019 18:30, gonzaloc
Draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable andre bakes 9 pans of brownies. he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students
Answers: 2
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