(a) What two sampling distributions are used in estimation and hypothesis testing of population means, proportions, paired differences, differences of means, and differences of proportions? (Select all that apply.)

the standard normal distribution

the standard Student's distribution

the standardtdistribution

the Student'stdistribution

the Student'szdistribution

What are the criteria for determining the appropriate sampling distribution? (Select all that apply.)

known or unknown?

known or unknown population sizes

known or unknown population proportions

normality

known or unknown?

What is the level of significance of a test?

The probability?of failing to rejectH₁when it is true.

The probability?of rejectingH₁when it is true.

The probability?of rejectingH₀when it is true.

The probability?of failing to rejectH₀when it is true.

The probability?of rejectingH₁when it is true.

What is theP-value?

The probability that the test statistic will take on values as extreme or more extreme than the observed test statistic.

The probability that the observed test statistic will take on values less extreme than the test statistic.

The probability that the test statistic will take the value of the observed test statistic.

The probability that the test statistic will take on values less extreme than the observed test statistic.

The probability that the observed test statistic will take on values as extreme or more extreme than the test statistic.

How is theP-valuerelated to the alternate hypothesis?

TheP-value determines whether the alternate hypothesis is left-tailed, right-tailed, or two-tailed.

TheP-value is accepted based on the alternate hypothesis.

TheP-value is rejected based on the alternate hypothesis.

The alternate hypothesis determines whether theP-value is left-tailed, right-tailed, or two-tailed.

The alternate hypothesis is rejected based on theP-value.

How is the null hypothesis related to the sample test statistic?

The null hypothesis being accepted or not depends on the sample test statistic.

The sample test statistic being rejected or not depends on the null hypothesis.

The sample test statistic being accepted or not depends on the null hypothesis.

The null hypothesis being rejected or not depends on the sample test statistic.

The sample test statistic is calculated from the null hypothesis.

(b) Suppose you want to study the length of time devoted to commercial breaks for two different types of television programs. Identify the types of programs you want to study (e.g., sitcoms, sports events, movies, news, children's programs, etc.). How large should the sample be for a specified margin of error?

It depends on not only the specified margin of error, but also on the confidence level.

It depends only on the specified margin of error.

It depends only on the confidence level.

What assumptions will you make regarding population distributions?

That population distributions are approximately uniform with known standard deviations.

That the population distributions are approximately normal with unknown standard deviations.

Thatd, the sample mean of the differences between the values has an approximately uniform distribution.

That population distributions are approximately normal with known standard deviations.

Thatd, the sample mean of the differences between the values has an approximately normal distribution.

What graphics might be appropriate? (Select all that apply.)

a scatterplot

a Student'stdistribution showing the area(s) corresponding to theP-value

a standard normal distribution

a standard normal distribution showing the area(s) corresponding to theP-value

a regression line

What methods of estimation will you use?

estimating?when?is unknown

estimating?₁?₂andp₁p₂

estimating?when?is known

estimatingpin the Binomial distribution

What methods of testing will you use? (Select all that apply.)

the criticalPmethod

theP-region method

the critical region method

theP-value method