9)A professor gave a quiz in a statistical methods class and created a histogram to observe...

9)A professor gave a quiz in a statistical methods class and created a histogram to observe the shape of the data. What would be the expected shape of the histogram if

a) the quiz is very easy

b) the quiz is very difficult

c) few students had high scores and few had low scores. Rest of them were in the middle, around (both sides) of the average score.

d) half of the students in the class have had good math background, other half have had no prior college math courses. The quiz emphasizes higher level math skills.

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