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Two-sample proportion tests use =F.INV for the critical value.

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

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

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”.

Sample 1: x̄1 = 48.5, s1 = 6.0, n1 = 36. Sample 2: x̄2 = 51.0, s2 = 5.0, n2 = 49. Compute TS. Round to 3 decimals.

A consultant claims there is no difference between two companies’ delivery-time variances. Sample A has variance 18, n = 16. Sample B has variance 12, n = 21. After correct labeling, TS = 1.500. The right F critical value is 2.250. The claim is H0. Is the claim supported? Answer “supported” or “not supported”.

In matched-pairs tests, the most common comparison value is often 0 because 0 represents no difference.

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Sample 1 has p̂1 = 0.68, n1 = 250. Sample 2 has p̂2 = 0.74, n2 = 300. Use p̄ = 0.713 and q̄ = 0.287. Compute TS. Round to 3 decimals.

In a matched-pairs income study, d = credit application income − tax return income. The claim is that people report higher income on credit applications. Which hypotheses are correct?