A researcher gathers data on the length of essays (number of lines) and the SAT

Question

A researcher gathers data on the length of essays (number of lines) and the SAT scores received for a sample of students enrolled at his university. Based on his regression results, the 95% confidence interval for the slope of the regression equation is - 0.88 to 1.34. At alpha = 0.05, which of the following statements is true? A. There is a statistically significant association between length of essays and SAT score. B. The slope of the regression equation is significantly different from zero. C. The slope of the regression equation is not significantly different from zero. D. The relationship between length of essays and SAT scores is significant and negative.

Explanation / Answer

as above given confidence interval contains 0 as its interval value.

therefore option C is correct. the slope of the regression equation is not significantly different from zero.

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