A Student Asked a Statistics Professor If Grades Were Marked

question 125

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:

Prototype

A mental image or best example of a category. Matching new items to a prototype provides a quick and easy method for sorting items into categories (as when comparing feathered creatures to a prototypical bird, such as a robin).

Mental Grouping

The cognitive process of organizing concepts, objects, or ideas into categories based on common properties to simplify understanding and memory.

Step-by-Step

Involves breaking down information, processes, or problems into smaller, manageable parts to facilitate understanding or completion.

Belief Perseverance

Clinging to one's initial conceptions after the basis on which they were formed has been discredited.