Exam 7: Theoretical Distributions Including the Normal Distribution

An empirical distribution is based on

Suppose you had 5 coins which you tossed in the air 100 times and recorded the number of heads on each toss. The distribution you generated would be a one.

Which of the following is always true of a normal distribution?

.4332 of the normal curve lies between $\mu$ and 1.5 $\sigma$ . The proportion between $\mu$ and .75 $\sigma$ is

What two parameters of a population must be known in order to use the normal curve table?

The area of a portion of a theoretical distribution is always equal to the probability of the events covered by that area.

Data Set 7-2: In the Fall of 1902 there were 184 seniors, 179 juniors, 267 sophomores, and 353 freshmen enrolled at a small college. -In Data Set 7-2 the probability of picking a student at random and getting a freshman is

Which of the following is an empirical distribution?

Adolphe Quetelet is known for

The normal curve, as it approaches the X axis, is reaching

Theoretical distributions are based on mathematics and logic.

For a normal distribution with mean of 75 and standard deviation of 25, the proportion of the scores between 90 and 100 is

An empirical distribution is based on

Which of the following things about the population must be known to use the theoretical normal curve to make decisions about an empirical population?

From a normal distribution with a mean of 150 and a standard deviation of 50, find a. the proportion of scores less than 225. b. the proportion of scores less than 0. c. the number of scores of 175 or more in a population of 500 scores.

A point on the normal curve with .40 of the curve beyond it has .10 between it and the mean.

Extreme scores on the normal curve are those near the mean.

Suppose that should k occur, it will be called a success. If j should occur, it will be called a failure. The ratio of k/(k + j) is