Example Quiz
#1
Statistics  Math 340
This quiz has been retired. It is not being used for the internet
version of Math 340 anymore.
Directions: This is test has multiple choice, True/False, and fill in the blank answers.
Select the option that BEST represents the correct answer. Make sure that
you include your name in the text of the answer.
Recommendation: Put your answers in a Word Document and
INCLUDE AN EXPLANATION OF ALL YOUR CALCULATIONS. I will give partial
credit if you were doing a math problem the right way but made a silly
error (we all do this  myself included!)
The bare minimum requirement
is to send me an email with your answers by the date on the main web page.
If there are any questions, contact me immediately!

(1.) Data were
collected on the ages of people in a neighborhood. The data are as
follows:
18,
10, 25, 35, 40, 50, 62, 20, 19, and 2.
What is the range of this data?
Range = ? ________________________

(2.) Which of
the following classifies data into categories that CAN be ranked; however,
precise differences between the ranks do not exist.
A

Ratio

B

Nominal

C

Ordinal

D

Interval

E

Qualitative

F

None: Trick Question


(3.) If a
colleague came to you and asked you to recommend a type of graph to
represent the changes in mutual fund performance (value in $ per
share) for the fund that he’s been considering, you would tell him to
use a(n):
A

ogive

B

frequency polygon

C

time series graph

D

pie chart

E

pareto chart

F

None: Trick Question


(4.) Find the
mean, median, and mode for the following data set:
24,
47, 9, 13, 26, 11, 13, 7, 26, 11

MEAN:______________

MEDIAN:______________

MODE(S?):______________


(5.) The following
list shows the steps in constructing a grouped frequency
distribution. These steps are listed in a random order. Select the
step that is wrong (in other words, "Which of the following is NOT a
correct step in the construction of a grouped frequency
distribution?").

1. Find the
lowest and highest data values

2. Tally the
data, find frequencies and cumulative frequency

3. Find the
class width (Range/number of classes, then round UP)

4. Find the
range (R = highest value  lowest value)

5. Find the
upper class limits

6. Select number
of classes desired (between 5 and 20)

7. Select a
starting point (usually lowest data value), add class width to get lower
limits

8. None: Trick
question

ANSWER:____________________

(6.) In the data set you are
studying, the data seem to be dispersed, or
spread out, over a larger interval than originally expected. Which of the
following would you use to measure the 'dispersion' of this data set?
A

Standard Deviation

B

Variance

C

Mean

D

Median

E

A or B

F

None: Trick Question


(7.) Read this carefully!
Both must be right to get full credit!
Part (a) The following is a
sample of n=5 measurements:
6.0,
3.0, 8.0, 5.0, 3.0
Calculate the Standard Deviation for
this set._______________
Part (b) The following is a
population of n=5 measurements:
6.0,
3.0, 8.0, 5.0, 3.0
Calculate the Standard Deviation for
this set._______________

HINT:
There's a difference between the standard deviation for
a sample and the standard deviation for a population!

The following set of numbers are used for
the next three questions:
18,
12, 25, 16, 27, 32, 25, 15, 23, 22, 37, 16, 25, 19, 16, 25, 19, 16, 29, 38,
29, 30, 21
(8.) What is the
Mode of this set? _________________

(9.) What is the
Median of this set? _________________

(10.) What is the Mean
of this set? _________________

Extra Credit.
A sample has a mean of 115 and a standard
deviation of 22. According to Chebyshev’s Theorem , (11/k^{2})*100%, how much of
the data will fall between three standard deviations of the mean?
A

50%

B

60%

C

82%

D

88.8%

E

75%

F

None: Trick question


END OF QUIZ 1
