the following information was obtained from two independent random samples: the sample means of the two samples are (45, 42), sample variances are (85, 90) and sample sizes are (10, 12). assume normally distributed populations with equal variances. the 95% confidence interval for the difference between the two population means is

How should the syntax in this sentence be changed, if at all? the scientists spent years analyzing the results of numerous medical studies meant to identify the cause of the disease. no change the scientists spent years looking at the results of a variety of different medical studies meant to locate the cause of the disease. the scientists spent years reviewing medical study results to find the cause of the disease. the scientists spent years studying the results of many medical studies in order to uncover the cause of the disease.