8.93 Sample size and the P-value. In this exercise, we examine the effect of the sample size on the significance test for comparing two proportions. In each case, suppose that and , and take n to be the common value of n₁ and n₂. Use the z statistic to test H₀: p₁ = p₂ versus the alternative H_a: p₁ ≠ p₂. Compute the statistic and the associated P-value for the following values of n: 60, 70, 80, 100, 400, 500, and 1000. Summarize the results in a table. Explain what you observe about the effect of the sample size on statistical significance when the sample proportions and are unchanged.