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The mean age of Senators in the 109th Congress was 60.35 years. A random sample of...

The mean age of Senators in the 109th Congress was 60.35 years. A random sample of 40 senators from various state senates had an average age of 55.4 years, and the population standard deviation is 6.5 years. At α= 0.05, is there sufficient evidence that state senators are on average younger than the Senators in Washington?

Which of the following is a correct conclusion:

a) There is sufficient evidence to warrant rejection of the claim that state senators are on average younger than the Senators in Washington

b) There is not sufficient evidence to warrant rejection of the claim that state senators are on average younger than the Senators in Washington

c) The sample data support the claim that state senators are on average younger than the Senators in Washington

d) There is not sufficient sample evidence to support the claim that state senators are on average younger than the Senators in Washington

Math   Statistics-And-Probability   
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