A Quality Control Supervisor Wishes to Determine Whether the Following

question 92

Multiple Choice

A quality control supervisor wishes to determine whether the following measurements are random: $$\begin{array}{l}\begin{array} { r r r r r r r r } 68.2 & 65 & 66.5 & 65 & 67.5 & 68 & 66 & 64.5 \\65.3 & 64.2 & 67.6 & 66.5 & 66.8 & 68.9 & 67 & 65 \\\hline\\\end{array}\\\begin{array} { r r r r r r r | } \hline 65 & 67 & 68 & 71 & 68.5 & 63.6 & 64.7 \\71.5 & 70.7 & 66 & 68.5 & 70.5 & 69.5 & 70.1 \\\hline\end{array}\end{array}$$ For this purpose, the supervisor uses a previous median of 67.9 and compares each measurement to the median to perform a runs test.She uses a significance level of 0.05.The appropriate decision is ______.

• A)reject the null hypothesis and conclude that the observations are random
• B)reject the null hypothesis and conclude that the observations are not random
• C)do not reject the null hypothesis and conclude that the observations are random
• D)do not reject the null hypothesis and conclude that the observations are not random
• E)do nothing