AP Statistics Review Quiz

Which formula is used to estimate the confidence interval for the mean difference between two independent samples?

• One-sample t-interval for μ

• Two-sample z-interval for p1−p2

• Two-sample t-interval for μ1−μ2

• Chi-Square Test for Homogeneity/Independence

What test is used for determining if there is a significant difference between the proportions of two samples?

• One-sample z-test for p

• Two-sample t-test for μ1−μ2

• Two-sample z-test for p1−p2

• Chi-Square Test for Goodness of Fit

Which test is applied to assess whether two categorical variables are independent?

• One-sample t-test for μ

• Two-sample z-interval for p1−p2

• Two-sample t-interval for μ1−μ2

• Chi-Square Test for Homogeneity/Independence

What is the appropriate test to compare the mean of a single sample to a known value?

• One-sample t-interval for μ

• One-sample t-test for μ

• One-sample z-interval for p

• Chi-Square Test for Goodness of Fit

Which formula would you use to construct a confidence interval for the proportion of a single sample?

• One-sample t-interval for μ

• One-sample z-interval for p

• Two-sample t-interval for μ1−μ2

• Chi-Square Test for Homogeneity/Independence

For which purpose is the Chi-Square Test for Goodness of Fit used?

• To estimate the confidence interval for the mean of a single sample

• To test the difference between the means of two independent samples

• To construct a confidence interval for the difference in proportions of two samples

• To determine if observed frequencies differ from expected frequencies

What is the degrees of freedom (df) for a one-sample t-test?

• n

• n - 2

• n + 1

• n - 1

Which calculator function can be used as a time saver for a two-sample t-test?

• 2-SampTTest

• 2-SampInt

• 2-PropZTest

• 2-PropZInt

When checking the Large Counts condition for a one-sample z-test for proportions, which symbol represents the population proportion?

• p̂

• p₀

• p̂₁

• p̂₂

For a two-sample z-test for proportions, what is the pooled sample proportion (p̂c) formula?

• p̂c = (x₁ + x₂) / (n₁ + n₂)

• p̂c = (p̂₁ + p̂₂) / 2

• p̂c = x₁ / n₁

• p̂c = x₂ / n₂