What's the Inference?

Do the data provide convincing evidence of a difference in the prices for a one-night stay between the travel and hotel website?

• One-sample z-interval for mean difference

• Two-sample t-test for difference of means

• One-sample t-interval for mean difference

• One-sample t-test for a mean difference

• Two-sample t-interval for difference of means

Those conducting the survey would like to estimate the proportion of all registered voters who believe there should be no term limits for members of Congress.

• One-sample z-interval for a proportion

• Chi-square test for goodness of fit

• One-sample t-test for a proportion

• One-sample z-test for a proportion

• One-sample t-interval for a proportion

Do the data support the college student's belief that there is a difference in word recall in warm versus cool rooms?

• Chi-square test for independence

• Two-sample z-test for difference of proportions

• Two-sample t-interval for difference of means

• Two-sample t-test for difference of means

• One-sample t-test for a mean difference

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Based on the survey results, does it appear that sports preferences in 2020 are different than those in 2010 for viewers of the website?

• t-test for a mean difference

• Chi-square test for goodness of fit

• Chi-square test for homogeneity

• Chi-square test for independence

• Two-sample z-test for a difference of proportions

The researchers would like to estimate the mean difference, in centimeters, of plants from untreated and treated seeds.

• One-sample t-interval for a mean difference

• Two-sample z-test for difference of proportions

• One-sample z-interval for a mean difference

• One sample z-test for a proportion

• Two-sample t-interval for difference of means

Based on the survey results, does it appear that the distribution of types of movies preferred by adults is different from 10 years ago?

• Chi-square test for association

• One-sample z-test for a proportion

• Two-sample z-test for difference of proportions

• Chi-square test for goodness of fit

• Chi-square test for homogeneity

At the significance level a 0.05, do the data provide convincing statistical evidence that taking a low-dose aspirin each day would reduce the chance of developing colon cancer among all people similar to the volunteers?

• Two-sample t-test for difference of means

• One-sample z-test for a proportion

• Two-sample z-test for difference of proportions

• Two-sample t-test for difference of proportions

• Two-sample z-interval for difference of proportions

Based on the results, is there convincing evidence that the mean reduction in cholesterol level is greater than the 20 mg/dl required by the regulatory agency?

• One-sample z-test for a proportion

• Two-sample t-test for difference of means

• One-sample t-test for a mean

• One-sample z-interval for a mean

• One-sample z-test for a mean

Do the data provide convincing statistical evidence of an association between age-group and gender in the diagnosis of schizophrenia?

• Chi-square test for homogeneity

• Two-sample z-test for difference of proportions

• Chi-square test for goodness of fit

• Chi-square test for independence

• Two-sample t-test for difference of means

John wants to provide a 98 percent confidence interval for the slope of the population regression line in his final report. Which procedure should he use?

• Chi-square interval for slope

• t-test for slope

• Two-sample t-interval for difference of means

• z-interval for slope

• t-interval for slope