The normal distribution is:
a) a bell-shaped density curve defined by the population mean, which determines the position of the center of the curve, and the population standard deviation, which determines the height and spread of the curve.
b) an imaginary histogram in which the width of each class is zero, and the number of population members is infinite.
c) a set of values that lie directly on a plot of a bell-shaped density curve, which is defined by the population mean () and the population standard deviation ().
d) a distribution that can be modeled by a bell-shaped curve, with the mean, median, and mode all the same value and the proportion for any range of values defined in a table of normal curve areas (or probabilities).
e) any distribution that can be modeled by a density curve.

Question

anonymous · Answer

I think it's either a or d, but I'm not sure. Maybe c?