Show work. No excel.
A. Null Hypothesis Ho: μ = 200
Alternative Hypothesis H1: μ ≠ 200 (Two-Tailed test)
In a random sample of 100 subjects, the sample mean found to be x̅ =220.
Population standard deviation is σ=50. Significance level is α = 0.10
Calculate test statistics
For the given significance level α = 0.10, find critical values (use attached table for Normal Distribution)
B. Draw the line for z-scale and use critical values to identify rejection region (shade these portions)
Mark position of test statistics on your z-scale.
Does test statistics fall in the rejection region?
Will you reject or do not reject Ho?