In Part Inspired by Events in Poland,Hungary

question 41

Multiple Choice

In part inspired by events in Poland,Hungary

• A) adopted sweeping reforms toward a Western-type democracy.
• B) kept a moderate Communist government but withdrew from the Warsaw Pact.
• C) experienced an uprising in Budapest that forced the Soviets to withdraw from the country.
• D) suffered a Soviet invasion followed by a new, brutal, Soviet-backed regime.
• E) all of the above

Recognize the assumptions underlying the F-test for equality of variances.

Know the symmetry properties of the F-distribution.

Apply the concept of F-distribution in constructing confidence intervals and calculating p-values.

Recognize when alternative statistical tests (z-test, t-test) are not appropriate for comparing variances.