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

question 81

Essay

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.

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Definitions:

Restaurant Meals

A service provided by restaurants where consumers pay to be served prepared food for consumption on the premises.

Value Added

The increase in the value of goods or services as a result of a particular process or activity, measuring the contribution of the process to the overall economy.

Final Goods

Products that have completed the manufacturing process and are sold to the final consumer.

Goods and Services

The tangible products and intangible activities produced and offered in an economy for purchase.