For each of the following samples that were given an experimental treatment, test whether the samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 46, (b) a sample of 1 with a mean of 50. The general population of individuals has a mean of 42, a standard deviation of 6, and follows a normal curve. For each sample, carry out a Z test using the five steps of hypothesis testing with a two-tailed test at the 0.05 significance level, and make a drawing of the distributions involved. (c) Figure the 95% confidence interval for parts (a) and (b).Assume that the distribution of means is approximately normal. Use the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected from part (a). Determine the sample's Z score on the comparison distribution.
Zequals
enter your response here (Type an integer or a decimal rounded to two decimal places as needed.)
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