Question: Two independent random samples have been selected: 96 observations from population 1 and 69 from population 2. Sample means Cn 23.439 and Xn, = 16.905

Two independent random samples have been selected: 96 observations from population 1 and 69 from population 2. Sample means Cn 23.439 and Xn, = 16.905 were obtained. From previous experience with these populations, it is known that the variances are Of - 6.9 and oz - 4.8. We are interested in testing Ho : (1 = (2 versus H1 : 1 / 2 and since the sample is large enough, we use a z-test statistic and reject when its absolute value is large enough for the requested O-level. What is the value of such a statistic? 17.3737 46.1962 5.0964 87.4279 64.0943

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