(a) Use the following data to compute a 95% CI for mu_1 - mu_2; m = 665, x = 229

Question

(a) Use the following data to compute a 95% CI for mu_1 - mu_2; m = 665, x = 2298, s_1 = 1512, n = 412, y = 2637, and s_2 = 1138. (Round your answers to two decimal places.) (-559.85), -240.15) Does the resulting interval suggest that mu_1 - mu_2 has been precisely estimated? The interval is fairly wide, which suggests a precise estimate. The interval is fairly narrow, which suggests a precise estimate. The interval is fairly wide, which does not suggests a precise estimate. The interval is fairly narrow, which does not suggests a precise estimate. (b) Use the following data to compute a 95% upper confidence bound for mu_1 - mu_2: m = 45, x = 42, 100, s_1 = 2400, n = 45, y = 36.800, and s_2 = 1800. 7329.04

Explanation / Answer

a) Since the length of the interval is pretty high, an estimate of the difference will fall within that interval. So it is difficult to find a precious estimate.

So option (c) is correct choice.

b) 99% upper confidence bound:

6387.

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