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Multiple Choice Quiz
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The null hypothesis
A)Is a statement about the value of the population parameter.
B)Will always contain the equal sign.
C)Cannot include values less than 0.
D)Both a and b are correct.
The alternate hypothesis
A)Is accepted if the null hypothesis is rejected.
B)Will always contain the equal sign.
C)Tells the value of the sample mean.
D)None of the above.
The level of significance
A)Is frequently .05 or .01.
B)Can be any value between 0 and 1.
C)Is the likelihood of rejecting the null hypothesis when it is true.
D)All of the above.
A Type I error is
A)The correct decision.
B)A value determined from the test statistic.
C)Rejecting the null hypothesis when it is true.
D)Accepting the null hypothesis when it is false.
The critical value is
A)Calculated from sample information.
B)Cannot be negative.
C)The point that divides the acceptance region from the rejection region.
D)A value determined from the test statistic.
In a one-tailed test
A)The rejection region is in one of the tails.
B)The rejection region is split between the tails.
C)The p-value is always less than the significance level.
D)The p-value is always more than the significance level.
To conduct a one sample test of means and use the z distribution as the test statistic
A)We need to know the population standard deviation.
B)We can use the sample standard deviation provided n is at least 30.
C)We need np to be at least 5.
D)Both A and B are correct.
The p-value is
A)The same as the population proportion.
B)The same as the significance level.
C)The fraction of the population that has a particular characteristic.
D)The probability of finding a value of the test statistic this extreme when the null hypothesis is true.
Which of the following statements are correct when deciding whether to use the z or the t distribution?
A)Use z when the sample size is 30 or more.
B)Use z when we have a normal population and know the standard deviation.
C)Use t when the population is normal, the population standard deviation is not known, and n is less than 30.
D)All of the above statements are correct.

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