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1) What is the primary function or purpose of descriptive statistics?
2) What do we call the process of gathering, organizing, summarizing, analyzing,
and interpreting data?
3) The performance of financial investments is measured with a percentage know
as return on investment. What kind of variable do we call return on investment?
4) What kind of variable is the amount of burglaries reported in a particular
city?
5) Name the level of measurement of the total number of auto accidents reported
in a certain month?
6) The titles of the job positions in a company, such as chief operating officer
or CEO, are examples of what level of measurement?
7) Sneaker sizes, such as 6A, 11D, and 14FF, would be considered which level of
measurement?
8) Consider the monthly commissions for first year stockbrokers: $1,200, $1,240,
$1,720, $1,350, $1,210, $1,470, $1,186, and $1,320. What are these figures
called?
9) A sample of computer workers shows monthly salaries of $1,233, $1,533,
$2,230, $1,323, $1,766, $1,23, $2,323, and $1,986. What do we call these
ungrouped figures?
10) The sum of the deviations at each data value from this measure of central
location will always be zero.
11) Consider any data set, which method of measurement of central location have
only one value?
12) Consider the list of people receiving government security:
13) What can a dot plot show us?
14) Test scores for 147 online students are calculated. Where is the location of
the test score associated with the third quartile?
15) Consider the results provided by the National Center for Health Statistics
reported 883 deaths in recent years. 24 from automobile accidents, 182 from
cancer issues, and 333 from heart disease. Using the relative frequency
approach, what is the probability that a particular death is due to an
automobile accident?
16) Two events A and B are mutually exclusive. What does the special rule of
addition tell us?
17) What would we call a list of all possible outcomes of an experiment and
their corresponding probability of occurrence?
18) What is the shape of a uniform probability distribution?
19) What is the mean of a uniform probability distribution?

3. 20) Consider normal distribution. The mean plus and minus 1.96 standard
deviations will include about what percent of all observations?
21) Consider a standard normal distribution. What will be the probability that z
is greater than 1.75?
22) A null hypothesis will make a claim about what?
23) Describe the level of significance?
24) Let’s perform a statistical test of the difference between two proportions
at the 0.05 level of significance. If the computed z is -1.07, what will be the
correct decision?
25) What condition must be met to perform a test for the difference of two
sample means?
26) Consider a hypothesis test that compares two population means. The combined
degrees of freedom equal 24. What statement about the sample sizes is NOT true?
Let’s assume the population standard deviations are equal.
27) What type of chart do we call it when paired data is plotted?
28) When a variable is used to predict the value of another variable, it is
called:
29) 20 randomly selected online students were given 15 multiple-choice problems
and 15 open-ended problems that cover the same topics. The teacher wanted to
know which questions the students scored better on. What kind of test is this?
30) The weights of 100 units of a product created by two identical processes
have same mean, but the standard of process A is 15 while that of B is 7. What
is true about this scenario?