Probability and Statistics

The total area under a probability curve is always

The range is a measure of

It is a measure of dispersion which depends upon the deviation of all scores from the mean.

Which of the following is not a continuous variable?

It represents that point in the data where one half of the scores fall below that point and one half falls above it.

Which of the following events are mutually exclusive?

In probability theory, what do you call the set of all possible outcomes of an experiment?

If A and B are two events and p(A and B) = p(A)p(B), then the two events are said to be

The highest score in a distribution minus the lowest score is called the

It refers to the number of times a score occurs in a sample.

It refers to the facts and figures collected on some characteristics of a sample.

In set theory, the sum A + B is denoted by

The most widely used measure of dispersion is the

The number of favorable outcomes divided by the total amount of outcomes is called

The sum of the squared deviation about the mean is called

In statistics, which of the following is a qualitative variable?

The positive square root of the variance is equal to

It is equal to the absolute difference between the observations in a sample and the mean divided by the total number of observations in the sample.

When the sample is large and the variable is quantitative which of the following measures of central tendency has a distinct advantage in terms of accuracy?

Which of the following events are mutually exclusive?