A Student Asked a Statistics Professor If Grades Were Marked

question 101

Multiple Choice

A student asked a statistics professor if grades were marked "on the curve." The professor decided to give the student a project to determine if last year's statistics grades were normally distributed. The professor told the student that last year's mean mark was 70 with a standard deviation of 10 and to use the following results. What is the calculated value of chi-square?

• A) 29.76
• B) 14.20
• C) 14.88
• D) 28.36
• E) 12.59

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Definitions:

Multiple Comparison Methods

Multiple comparison methods are statistical procedures used to evaluate differences among three or more group means while controlling for the probability of making type I errors.

Fisher's LSD Procedure

A statistical method used for comparing means when the null hypothesis has been rejected in an ANOVA test, standing for Least Significant Difference.

ANOVA

Stands for Analysis of Variance, a statistical method used to determine the existence of significant differences between the means of three or more independent groups.

F-test

A statistical test used to compare either two variances or the variances of more than two groups at the same time.