Question 1

Which of the following best describes the data type for the number of votes received by a candidate in an election (e.g., 16,679,583 votes)?

Accepted Answer

Discrete data

Question 2

The volume of cola in a can is measured as 12.3 oz. Which type of data is this?

Accepted Answer

Continuous data

Question 3

Which level of measurement is most appropriate for the variable 'Types of movies (drama, comedy, adventure, documentary, etc.)'?

Accepted Answer

Nominal

Question 4

A researcher ranks cars from best to worst based on their performance. What is the level of measurement for these ranks?

Accepted Answer

Ordinal

Question 5

Measured amounts of greenhouse gases emitted by cars are best classified as which level of measurement?

Accepted Answer

Ratio

Question 6

A Gallup poll surveyed 1,018 adults by telephone, and 22% reported smoking within the past week. What type of study is this?

Accepted Answer

Observational

Question 7

Children with upper respiratory tract infections were given Echinacea or a placebo to compare outcomes. What type of study is this?

Accepted Answer

Experimental

Question 8

A student collects arm length measurements from her family members. Which sampling method is this?

Accepted Answer

Convenience sampling

Question 9

On election day, ABC News randomly selects specific polling stations and surveys all voters as they leave. What sampling method is used?

Accepted Answer

Cluster sampling

Question 10

At a sobriety checkpoint, every fifth driver is stopped and interviewed. Which sampling method is this?

Accepted Answer

Systematic sampling

Question 11

Given the following frequency distribution for tar (mg) in filter cigarettes: 2-5 (2), 6-9 (2), 10-13 (6), 14-17 (15), what is the class width?

Accepted Answer

$$3$$

Question 12

You have a data set of heights ranging from 53.5 in. to 83.4 in. and want to create 10 classes for a frequency table. What is the most suitable lower limit for the first class?

Accepted Answer

$$53.5$$

Question 13

Given the FICO scores: 714, 751, 664, 789, 818, 779, 698, 836, 753, 834, 693, 802, what is the mean score? (Round to the nearest whole number.)

Accepted Answer

$$763$$

Question 14

A data set has a mean of $$0.88$$ and a standard deviation of $$1.73. $$What is the $$z-$$score for a value of $$3.96$$? (Round to the nearest hundredth.)

Accepted Answer

Question 15

A data set has a mean of $$0.88$$ and a standard deviation of $$1.73. $$What is the $$z-$$score for a value of $$3.96$$? (Round to the nearest hundredth.)

Accepted Answer

$$1.78$$

Question 16

Which score has a higher relative position: a score of $$65 on a $$test with mean $$87$$ and standard deviation $$21$$, or a score of $$515 on a $$test with mean $$737$$ and standard deviation $$198$$?

Accepted Answer

Score of $$65$$

Question 17

Given the following Super Bowl scores for 24 years: 36, 37, 37, 39, 39, 41, 43, 44, 44, 47, 50, 53, 54, 55, 56, 56, 57, 59, 61, 61, 65, 69, 69, 75. What is the location (position) of the $$P_{32}$$ percentile?

Accepted Answer

$$8.08$$

Question 18

For the same Super Bowl scores, what is the location (position) of the $$P_{80}$$ percentile?

Accepted Answer

$$19.2$$

Question 19

Given a frequency distribution for tar in non-filtered cigarettes: 10-13 (1), 14-17 (0), 18-21 (15), 22-25 (7), 26-29 (2), what is the coefficient of variation if the mean is $$21.5$$ and the standard deviation is $$3.5$$? (Round to the nearest percent.)

Accepted Answer

$$24\%$$

Question 20

Which of the following best describes the five-number summary for a data set?

Accepted Answer

Minimum, first quartile, median, third quartile, maximum

Step-by-Step Guidance for MTH 243 Exam 1 Review (Statistics)

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