Which of the following is true of Tukey's Multiple Comparison Method?
a. It is based on the studentized range statistic to obtain the critical value needed to construct individual confidence intervals.
b. It theoretically requires that all sample sizes be equal, or at least similar.
c. It is more powerful than the LSD method.
d. All of these choices are true.
Question 2
An x chart for a normally distributed random variable has control limits set at 3 standard errors from the centerline. One sample mean falls outside the control limits when the process is actually under control. The probability that this happened by chance is:
a. .997 c. .050
b. .500 d. .003
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