In a symmetric and mound shaped distribution, we expect the values of the mean, median, and mode to differ greatly from one another.

Select one:

a.True

b.False

The set of all possible outcomes (sample points) is called

Select one:

a.a sample

b.an event

c.a population

d.the sample space

If two events A and B are mutually exclusive events, then

Select one:

a.P (A) + P (B) = 0

b.P (A) + P (B) = 1

c.P (A U B) = 0

d.P (A B) = 0

When the standard deviation is smalI, the scores will

Select one:

a.scatter widely from the mean

b.have a low mean

c.cluster closely around the mean

d.have a high mean

The probability based on personal knowledge of the persons involved in the experiment is classified as:

Select one:

a.Intuitive approach

b.Objective approach

c.Subjective approach

d.Sample approach

A histogram is a graph that represents the cumulative frequencies for the classes in a frequency distribution.

Select one:

a.True

b.False

The cumulative frequency for a class is the sum of the frequencies of the classes less than and equal to the upper boundary of the specific class.

Select one:

a.False

b.True

If group A is more homogeneous than group D, then group A will

Select one:

a.have a smaller standard deviation

b.have a larger standard deviation

c.be less skewed

d.none of the following

If a card is chosen from a standard deck of cards, what is the probability of getting a diamond () or a club ()?

Select one:

a.26/52=1/2

b.13/52

c.12/52

A larger standard deviation means greater variability in the data.

Select one:

a.True

b.False

The percentages of white, wheat, and rye bread sold at a supermarket each week is best shown using a bar graph.

Select one:

a.False

b.True

d.20/52

The probability of the union of two events is computed by using the

Select one:

a.Law of Division

b.Law of Multiplication

c.Law of Subtraction

d.Law of Addition

The sum of the percent frequencies for all classes will always equal

Select one:

a.the number of classes

b.100

c.one

d.the number of items in the study

Fill in the blank. __________ gives us a method of interpreting the standard deviation of any data set, where the shape of the distribution is symmetric or approximately symmetric.

Select one:

a.Chebyshev's Rule

b.The Empirical Rule

c.both A and B

d.neither A nor B

A single summarizing number used to describe a whole distribution of test scores is

Select one:

a.the mean

b.the median

c.none of the following

d.the mode

e.all of the following

In skewed distributions, the mean is the best measure of the centre of the distribution since it is least affected by extreme observations.

Select one:

a.True

b.False

Which of the following is not one of the common ways to assign probability to events?

Select one:

a.Mutual response assessment

b.Relative frequency of occurrence

c.Subjective probability assessment

d.Classical probability assessment

Graphs that show distributions using proportions instead of raw data as frequencies are called

Select one:

a.ogive graphs.

b.frequency polygons.

c.histograms

d.relative frequency graphs.

The variance of a set of data can never be negative.

Select one:

a.True

b.False