The Times (In Minutes) to Assemble a Component for Three

Multiple Choice

The times (in minutes) to assemble a component for three different cell phones are listed below. Use α= 0.01.Which of the following is correct? $$\begin{array} { c | c | c } \text { Phone } 1 & \text { Phone } 2 & \text { Phone } 3 \\\hline 32 & 40 & 25 \\30 & 29 & 31 \\31 & 38 & 29 \\32 & 33 & 28 \\33 & 36 & \\31 & 32 & \\& 35 &\end{array}$$

A) The mean time to assemble Phone 1 is the same as the mean time to assemble Phone 2.
B) The mean time to assemble Phone 1 is different from the mean time to assemble Phone 3.
C) The mean time to assemble Phone 2 is the same as the mean time to assemble Phone 3.
D) There is not enough evidence to suggest that the means are different.