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A Sample Is Used to Obtain a 95% Confidence Interval

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A sample is used to obtain a 95% confidence interval for the mean of a population.The confidence interval goes from 15 to 19.If the same sample had been used to test the null hypothesis that the mean of the population is equal to 20 versus the alternative hypothesis that the mean of the population differs from 20,the null hypothesis could be accepted at a level of significance of 0.01.


Definitions:

Return on Investment

A measure of the profitability of an investment, calculated as the net profit of the investment divided by its cost.

Net Profit

Represents the amount of money a company retains after subtracting all its expenses, taxes, and costs from its total revenue.

Net Income

represents the total earnings of a company after deducting all expenses and taxes from total revenue.

Return on Investment

The gain or loss generated on an investment relative to the amount of money invested.

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