Chapter 02 Quiz (with video solutions)

Relative frequencies for all classes will always have a sum equal to..

A study was conducted to investigate the effect of a coal-fire
generating plant upon the water quality of a river. As part of an
environmental impact study, fish were captured, tagged, and released.

The following information was recorded for each fish:
Sex (0=female, 1=male), Length (cm), Maturation (0=young, 1=adult),
Weight (g).

he scale of these variables is:…

A ‘modal class’ is the category in a frequency distribution that
contains:

Which type of data allows for all calculations to be performed?

For which data type are values simply arbitrary numbers (they do not
represent measurements or quantitites)?

Levels of education labeled as elementary school, high school, some
college, and college graduate are examples of:

Frequencies are the only calculations that can be done for what type of
data?

A pie chart would best suit which of the following?

Customers are being surveyed in regards to which car dealership they
best believed offered the best service. The choices offered were Jim
Trenway Chevrolet (J), Marshall Ford (M), Mylenbusch Auto Service
(S), and Milford Nissan (N). Based on the information given, what was
the percentage of customers that were identified Jim Trenway
Chevrolet as having offered the best service overall?

S J J J N J M S J N
N M J M S J M M J J
J J J S N M M J J S
S N J N S M J J N J

Of the following statements, which one is not correct?

Which format best displays two nominal variables?

TRUE / FALSE:

The age of a person is an interval variable.

TRUE / FALSE:

The age groups of movie-goers (3-13, 14-64, 65+) is an interval
variable.

TRUE / FALSE:

The letter grades assigned at the end of semester by your professor
are nominal.

TRUE / FALSE:

Categories and their counts are listed on a relative frequency
distribution.

TRUE / FALSE:

Nominal data can be tracked through bar and pie charts. The bar
charts are able to express the number of occurrences per category
while pie charts express the proportional occurrences per category.