검증된 단계별 안내
08:18
5:37
05:11"In Exercises 13–18, test the claim about the difference between two population variances σ₁² and σ₂² at the level of significance α. Assume the samples are random and independent, and the populations are normally distributed.
Claim: σ₁² > σ₂²; α = 0.10.
Sample statistics: s₁² = 773, n₁ = 5 and s₂² = 765, n₂ = 6"
Conditional Relative Frequencies In Exercises 37–42, use the contingency table from Exercises 33–36, and the information below.
Relative frequencies can also be calculated based on the row totals (by dividing each row entry by the row’s total) or the column totals (by dividing each column entry by the column’s total). These frequencies are conditional relative frequencies and can be used to determine whether an association exists between two categories in a contingency table.
What percent of U.S. adults ages 25 and over who have a degree are not in the civilian labor force?
Finding Expected Frequencies
In Exercises 3–6, find the expected frequency for the values of n and pᵢ.
n=415, pᵢ=0.08
"Finding a Critical F-Value for a Two-Tailed Test In Exercises 9–12, find the critical F-value for a two-tailed test using the level of significance α and degrees of freedom d.f.N and d.f.D.
α=0.10, d.f.N=24, d.f.D=28"
State the null and alternative hypotheses for a one-way ANOVA test.
Describe the difference between the variance between samples MSB and the variance within samples MSW.
