A Recent Article in the Wall Street Journal Entitled "As

question 143

Multiple Choice

A recent article in The Wall Street Journal entitled "As Identity Theft Moves Online,Crime Rings Mimic Big Business" states that 39% of the consumer scam complaints by American consumers are about identity theft.Suppose a random sample of 90 complaints is obtained.Of these complaints,40 were regarding identity theft.Based on these sample data,what conclusion should be reached about the statement made in The Wall Street Journal? (Test using α= 0.10. )

• A)Since z = 1.947 > 1.645,we reject the null hypothesis.
• There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong.
• B)Since z = 2.033 > 1.96,we reject the null hypothesis.
• There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong.
• C)Since z = 1.341 < 1.645,we do not reject the null hypothesis.
• There is insufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong.
• D)Since z = 0.97 < 1.645,we do not reject the null hypothesis.

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Definitions:

Demographic Questions

Questions used in surveys or research that collect data about the characteristics of populations, such as age, gender, income level, and educational background.

Construct Validity

The extent to which a test measures what it claims, or purportedly aims, to be measuring.

Independent Variable

The factor in a study that is deliberately altered by the investigator to observe its effect on the outcome variable.

Experimental Conditions

The controlled aspects of a scientific experiment designed to test the effects of independent variables on dependent variables.