STATISTICS Math 221 WEEK 3 Homework Questions with Answers: DeVry University

Question 1
pts
(CO 1) A survey of 128 DeVry statistics students found that 83% read the
announcements each week. What is the population and what is the sample?


Population: DeVry statistics students; Sample: the 83% that read the announcements
weekly



Population: all statistics students reading announcements weekly; Sample: the 128
DeVry statistics students



Population: all statistics students; Sample: 128 DeVry statistics students

Correct!

Population: DeVry statistics students: Sample: 128 DeVry statistics students

See text page 3


Question 2
pts
(CO 1) In asking all 349 second graders in a school district, it is found that on average,
these second graders have 2.5 pets. Is this number a parameter or a statistic and why?
Correct!

Parameter as it represents the population



Statistic as it represents the sample



Statistic as it represents the population



Parameter as it represents the sample

,See text page 4


Question 3
pts
(CO 1) Classify the data of all the political parties in the world.


Quantitative

Correct!

Qualitative



Statistics



Classical

See text page 9


Question 4
pts
(CO 1) The data set that lists a company’s competitors and their locations would be
classified as what type of data?
Correct!

Nominal



Ordinal



Interval

, Ratio

See text pages 10-11


Question 5
pts
(CO 1) A data set that includes the shows on a station during the day would be
classified as what type of data?
Correct!

Nominal



Ratio



Ordinal



Interval

See text pages 10-11


Question 6
pts
(CO 1) What type of data collection might be best to estimate the amount of time
individuals spend socializing?


Survey



Experiment

Correct!

Observational