Lucy Baker Is Analyzing Demographic Characteristics of Two Television Programs,American $\sigma$

question 79

Multiple Choice

Lucy Baker is analyzing demographic characteristics of two television programs,American Idol (population 1) and 60 Minutes (population 2) .Previous studies indicate no difference in the ages of the two audiences.(The mean age of each audience is the same.) Her staff randomly selected 100 people from each audience,and reported the following: 1 = 43 years and 2 = 45 years.Assume that $\sigma$ 1 = 5 and $\sigma$ 2 = 8.Assuming a two-tail test and $\alpha$ = .05,the observed z value is _________________.

• A)-2.12
• B)-2.25
• C)-5.58
• D)-15.38
• E)-20.68

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Definitions:

Sealed-Bid

A type of auction or tender where bidders submit confidential offers, and usually, the highest bid wins without the bids being disclosed to other participants.

Second-Price Auction

In a second-price auction, the highest bidder wins but pays the price bid by the second-highest bidder, encouraging participants to bid their true value.

Expected Revenue

The anticipated amount of money a business expects to receive over a certain period, usually as a result of sales or services.

Foreclosed

A legal process in which a lender takes control of a property after the borrower fails to meet the repayment terms of the loan.