I'm working on a statistics test / quiz prep and need an explanation and answer to help me learn.

1- Statistics is described as the ‘science of collecting, describing, & interpreting data’. Using your own
words, explain each of the three statistical values with an example.
(2 points)
ANS:
2- Of the adult U.S., 36% has an allergy. In a sample of 1,200 randomly selected adults,33.2% had an
allergy. ANSWER ANY THREE
(3 points- 1 pt. each)
a) Describe the population
b) What is the sample
c) Identify the statistic & give its value
d) Identify the parameter & give its value
ANS:
3- In your own words, explain why the parameter (population) is fixed & the statistic (sample) varies. (2
points)
ANS:
4-Identify the following statement as descriptive in nature, or as inferential: “The average
age of 500 surveyed students in your institution is 23 years.” (1 point)
ANS:
5- A population is the complete collection of individuals or objects or events whose
properties are to be analyzed. TRUE / FALSE (1 point)
6-The “number of rotten oranges per shipping crate” is an example of a quantitative
variable. TRUE / FALSE (1 point
7-If we desire to select a 4% systematic sample, first we will randomly select one element
from the first 40 elements, and then proceed to select every 4th item thereafter until we
have the desired number of data for our sample. TRUE / FALSE (1 point)
8- At Central Michigan University, 500 students are randomly selected and asked the distance of
their commute to campus. From this group a mean of 15.6 miles is computed.
What is the variable of interest? (1 point)
ANS:

2
9- An office supply warehouse has boxes of pencils, 100 pencils to the box. Information about the entire
warehouse as well as a sample of the boxes is shown below:
Number of defectives
per box
Number of boxes
(in warehouse)
Number of boxes
(in sample)
0 1500 50
1 250 20
2 75 3
3 40 3
4 10 1
Describe the population in the information provided above (2 points)
ANS:
10- A quality-control inspector selects assembled parts from an assembly line and records the
information concerning each part as: A: defective or non-defective, B: the employee number of the individual
who assembled the part, and C: the weight of the part.
a) What is the population? (1 point)
ANS:
b) Is the population finite or infinite? Why? (1 point)
ANS:
c) What is the sample? (1 point)
ANS:
11- The process of summarizing the data is called. MULTIPLE CHOICE (1 point)
a) inferential statistics
b) nominal data
c) descriptive statistics
d) deferential statistics
12- USA Today regularly asks readers, “ Have a complaint about airline baggage handling ,refunds,
advertising , customer service? What kind of sampling method is this? (2 Points)
ANS: