Random samples were selected from three populations. The data obtained are shown below. Please note that the sample sizes are not equal.
$\begin{array}{lll}\text { Treatment } 1&\text { Treatment } 2&\text { Treatment } 3\
45 & 31 & 39 \
41 & 34 & 35 \
37 & 35 & 40 \
40 & 40 & \
42 & &
\end{array}$
a. Compute the overall mean .
b. At 95% confidence, test to see if there is a significant difference among the means.

Question

Random samples were selected from three populations. The data obtained are shown below. Please note that the sample sizes are not equal.
 $\begin{array}{lll}\text { Treatment } 1&\text { Treatment } 2&\text { Treatment } 3\
45 & 31 & 39 \
41 & 34 & 35 \
37 & 35 & 40 \
40 & 40 & \
42 & &
\end{array}$ 
a. Compute the overall mean .
b. At 95% confidence, test to see if there is a significant difference among the means.

Quizplus · Accepted Answer

The Answer of Random samples were selected from three populations. The data obtained are shown below. Please note that the sample sizes are not equal.
 $\begin{array}{lll}\text { Treatment } 1&\text { Treatment } 2&\text { Treatment } 3\
45 & 31 & 39 \
41 & 34 & 35 \
37 & 35 & 40 \
40 & 40 & \
42 & &
\end{array}$ 
a. Compute the overall mean .
b. At 95% confidence, test to see if there is a significant difference among the means.

Random Samples Were Selected from Three Populations A Compute the Overall Mean