Question: In random samples 74 of 250 persons who watched a
In random samples, 74 of 250 persons who watched a certain television program on a small TV set and 92 of 250 persons who watched the same program on a large set remembered 2 hours later what products were advertised. Use the x2 statistic to test the null hypothesis θ1 = θ2 against the alternative hypothesis θ1 ≠ θ2 at the 0.01 level of significance.
Answer to relevant QuestionsUse the statistic of Exercise 13.12 to rework Exercise 13.68. In exercise In random samples, 74 of 250 persons who watched a certain television program on a small TV set and 92 of 250 persons who watched the same program on ...If 26 of 200 tires of brand A failed to last 30,000 miles, whereas the corresponding figures for 200 tires of brands B, C, and D were 23, 15, and 32, test the null hypothesis that there is no difference in the durability of ...Show that the two formulas for x2 on pages 368 and 369 are equivalent. Modify the critical regions on pages 365 and 366 so that they can be used to test the null hypothesis λ = λ0 against the alternative hypotheses λ > λ0, λ < λ0, and λ ≠ λ0 on the basis of n observations. Here λ is ...Solve the normal equations on page 390 simultaneously to show that
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