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Difference in mean number of hours spent at terminal

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The manager of a computer software company wishes to study the number of hours top executives spend at their computer terminals by type of industry. The manager seleceted a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours spent at a terminal per week by industry?

Banking
12
10
10
12
10

Retail
8
8
6
8
10

Insurance
10
8
6
8
10

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The manager of a computer software company wishes to study the number of hours top executives spend at their computer terminals by type of industry. The manager seleceted a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours spent at a terminal per week by ...

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