Exam 5: Probability and the Normal Curve

The distribution of test scores for the population is normal, with a mean of 33 and a standard deviation of 6.3. The percentage of the population that scored between Kim and John is __________.

Probability is defined as:

The question below refers to the following table: The percent of area between the mean and z = 1.45 is __________.

The question below refers to the following table: The probability of obtaining a score between z = -1.40 and the mean is __________.

If 68% of IQ scores are between 85 and 115, what is the probability of meeting a person in The population within that IQ range?

Normal curves are often used to compare samples to populations.

The probability of a student correctly guessing the answer to this question is:

Roughly __________ of the total area under the normal curve rests between the mean and One standard deviation above the mean.

Which of the following is true of probabilities?

A probability distribution is essentially a frequency distribution of percentages for:

The question below refers to the following situation: The average price for a new car is $18,000 and the standard deviation is $1,500. Calculate The z scores for the following individual score: If X = 19,000, z = __________.

Assume citizens were asked about their views on healthcare reform. The results are listed below. What is the probability of selecting at random from this group a citizen who does NOT support healthcare reform?

A z-score tells nothing about the distance of a score from the mean.

In a symmetrical distribution, what percent of the scores fall above the mean?

Assume citizens were asked about their views on healthcare reform. The results are listed below. What is the probability of selecting at random from this group a Democrat who supports healthcare reform?

A z-score is a specific case's distance from the mean in __________ units.

Empirical probability distributions are those dependent on:

Assume citizens were asked about their views on healthcare reform. The results are listed below. What is the probability of selecting at random from this group a citizen who is a Democrat?

Which of the following is NOT true of the normal curve?

If the probability (p) of giving birth to a boy is .51, and a woman can only give birth to a Single boy or girl, then the probability of giving birth to a girl is: