Sample 1 has n1 = 200 and x1 = 160. Sample 2 has n2 = 300 and x2 = 210. What is p̄?

Which function is used for a matched-pairs test with n = 45 pairs?

H1: μd > 0. What type of test is implied? Answer with left-tail, right-tail, or two-tail.

Why are there no small-sample proportion tests in Module 7?

Matched-pairs tests use paired observations rather than two unrelated independent samples.

Sample 1: x̄1 = 12.4, s1 = 2.0, n1 = 64. Sample 2: x̄2 = 11.6, s2 = 2.4, n2 = 81. Compute TS. Round to 3 decimals.

A two-sample mean test has n1 = 30 and n2 = 100. Which Excel function is used to find the critical value?

Two-sample proportion tests use a pooled proportion p̄ to find the TS.

The sample standard deviation, as used in the TS formula for paired differences, is written as ______.

In a matched-pairs income study, the claim is that people report at least $12k more on credit applications, so H0: μd ≥ 12. A sample of 36 pairs gives d̄ = 11.3, sd = 5, and TS = -0.840. The left-tail critical value is -2.326. Is the claim supported? Answer “supported” or “not supported”.