The Kimberly Clark Corporation wants to determine how many t…
The Kimberly Clark Corporation wants to determine how many tissues a box of Kleenex should contain. Researchers determine that 60 is the average number of tissues used by a typical person during a cold. Suppose a random sample of 100 Kleenex users yielded a sample mean of 56 tissues and a sample standard deviation of 10 tissues used during a typical cold. Kimberly Clark wants to test: Ho: μ = 60 tissues Ha: μ < 60 tissues using a significance level (α) = 0.05. What is the correct value of the test statistic that should be used to test the null hypothesis?