Suppose a professor sees that his students' exam scores do not follow a normal curve, but he decides to assign grades by grading on a bell-shaped curve anyway. Explain how this procedure tends to distort the grades.
Q. 2Nature provides numerous examples of populations of measurements that, at least approximately, follow a normal curve. Give one example.
Q. 3With a frequency curve, to figure out what percentage or proportion of the population falls into a certain range, you have to figure out the __________ under the curve over that range.
Fill in the blank(s) with correct word
Q. 4The bell-shaped frequency curve is so common that if a population has this shape, the measurements are said to follow a __________ distribution.
Fill in the blank(s) with correct word
Q. 5Which of the following describes the entire area underneath a frequency curve?
a. The entire area is 1 or 100.
b. The entire area is equal to the total number of individuals in the population.
c. The entire area is equal to the total percentage of individuals in the population with the measurement being studied.
d. None of the above.
Q. 6What is another term for measurements following a normal distribution'?
a. The measurements follow a bell-shaped curve.'
b. The measurements follow a normal curve.'
c. The measurements follow a Gaussian curve.'
d. All of the above
Q. 7In a frequency curve, how do you interpret the height of the curve at any particular point?
a. The number of individuals in the population having that particular measurement.
b. The proportion of individuals in the population having that particular measurement.
c. The height of the individuals in the population represented by that particular point.
d. None of the above.
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