Multiple Choice
A survey of 144 retail stores revealed that the average price of a DVD was $375 with a standard error of $20. If 95% and 98% confidence intervals were developed to estimate the true cost of the DVD, what differences would they have?
A) Standard errors
B) Interval widths
C) Z-values
D) Both standard errors and interval widths
E) Both interval widths and Z-values
Correct Answer:
Verified
Correct Answer:
Verified
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