Question
A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: x = $50.50 and s2 = 400. A 95% confidence interval for the average amount the credit card customers spent on their first visit to the chain's new store in the mall is:
a. $50.50 ± $11.00
b. $50.50 ± $9.09
c. $50.50 ± $11.79
d. $50.50 ± $10.12
e. $50.50 ± $11.08
a. $50.50 ± $11.00
b. $50.50 ± $9.09
c. $50.50 ± $11.79
d. $50.50 ± $10.12
e. $50.50 ± $11.08
Answers
95% = mean ± 1.96SEm
SEm = s/√n
s = √(s^2)
I'll let you do the calculations.
SEm = s/√n
s = √(s^2)
I'll let you do the calculations.
10.12
$50.50+-11.08$
Related Questions
AJ DAVIS is a department store chain, which has many credit customers and wants to find out more inf...
A discount store chain has a data breach, which means that a hacker now has the credit card numbers...
A discount store chain has a data breach, which means that a hacker now has the credit card numbers...
Which of the following will increase your credit score?(1 point)
Responses
You have a major cred...