Which of the following is not an observation about critical values? choose the correct answer below. a.a critical value is the number on the borderline separating sample statistics that are likely to occur from those that are unlikely to occur. b.the number z subscript alpha divided by 2is a critical value that corresponds to an area of 1minusalpha divided by 2to its left. c.a critical value is the area in the right-tail region of the standard normal curve. d.the number z subscript alpha divided by 2is a critical value that is a z score with the property that it separates an area of alpha divided by 2in the right tail of the standard normal distribution.

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.