You Wish to Construct a 95% Confidence Interval to Compare

question 30

Multiple Choice

You wish to construct a 95% confidence interval to compare the mean measurement for two groups.A small pilot study yields sample standard deviations of 10 and 15 for Group 1 and Group 2,respectively.If we wish to obtain a margin of error of at most 5,what sample size should we take from each group? Assume equal sample sizes.

• A)46
• B)50
• C)48
• D)47
• E)49

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Definitions:

The Billboard

A large outdoor advertising structure typically found in high-traffic areas, used to display promotional or advertising messages.

Billboards

Large outdoor advertising structures typically found in high-traffic areas, used for displaying promotional messages or campaigns.

Local Reach

The extent to which a business or service can impact or cover an area or community within a close geographic vicinity.

Place-Based Media

Advertising media that is located in specific places outside the home, such as billboards, transit ads, and digital signage, to reach target audiences in specific locations.