A Test of Spelling Ability Is Given to a Random

question 128

Short Answer

A test of spelling ability is given to a random sample of 10 students before and after they complete a spelling course.The mean score before the course was 119.60 and after the course the mean score was 130.80.The standard deviation of the difference is 16.061.Test the hypothesis at α = .05 using a t test.

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Definitions:

Growth Rate

The rate at which a company's sales, earnings, dividends, or other key metrics increase over a specified period of time.

Annual Dividend

The annual sum of dividends received by a shareholder for each share of stock owned.

Required Return

The minimum profit or yield that investors expect to receive on an investment, factoring in its risk.

Constant

A fixed value that does not change.