A major airline has stated in an industry report that its mean onground time between domestic flights is less than 18 minutes. To test this, the company plans to sample 36 randomly selected flights and use a significance level of .10.
Assuming that the population standard deviation is known to be 4.0 minutes, if the true population mean is 16 minutes, the decision maker could end up making either a Type I or a Type II error depending on the sample result. Indicate whether the statement is true or false
Question 2
In a one-way design, which of the following is true?
A) The populations must have equal means.
B) The sample sizes must be equal.
C) The mean squares between will be larger than the mean squares within if the null hypothesis is rejected.
D) The sample sizes must all differ.
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