A Researcher Gathers Data on the Length of Essays (Number

question 2

Multiple Choice

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 α = 0.05, we can say ________________________ .

• A)there is a statistically significant association between length of essays and SAT score.
• B)the correlation between length of essays and SAT score is significant
• C)the slope of the regression equation is significantly different from zero
• D)the slope of the regression equation is not significantly different from zero
• E)the relationship between length of essays and SAT scores is significant and negative

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Definitions:

Sample Size

The number of observations or units selected from a population of interest for the purpose of statistical analysis.

R-charts

Control charts used in statistical process control to monitor the variability of a process based on samples of ranges.

Manual Calculations

Manual Calculations involve performing mathematical operations by hand without the aid of software or automated tools, often for the purpose of verifying computational accuracy.

Factory Floor

The operational area of a manufacturing plant or facility where goods are produced or assembled.