Question 1(1 point)

What is the sampling method used in the following scenario? A teacher wants to know if her students are doing homework, so she randomly selects rows two and five and then calls on all students in row two and all students in row five to present the solutions to homework problems to the class.

Question 1 options:

	convenience
	stratified
	cluster
	simple random
	systematic

Question 2(1 point)

A group of test subjects is divided into twelve groups; then four of the groups are chosen at random. What type of sampling is used?

Question 2 options:

	Cluster
	Convenience
	Stratified
	Systematic
	Simple Random

Question 3(1 point)

"Number of times per week" is what type of data in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed.

Question 3 options:

	Qualitative
	Quantitative Discrete
	Quantitative Continuous

Question 4(1 point)

The first 50 people who walk into a sporting event are polled on their television preferences. What type of sampling was used?

Question 4 options:

	Convenience
	Systematic
	Stratified
	Cluster

Question 5(1 point)

What is the sampling method used in the following scenario? The marketing manager for an electronics chain store wants information about the ages of its customers. Over the next two weeks, at each store location, 100 randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest.

Question 5 options:

	systematic
	simple random
	convenience
	cluster
	stratified

Question 6(1 point)

What is the term for a characteristic or attribute that can assume different values?

Question 6 options:

	variable
	exponent
	datum
	sample

Question 7(1 point)

A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter. X = number of days a Lake Tahoe Community College math student is absent In this case, X is an example of :

Question 7 options:

	data
	a statistic
	population
	a variable

Question 8(1 point)

A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter. X = number of days a Lake Tahoe Community College math student is absent The instructor's sample produces a mean number of days absent of 3.5 days. This value is an example of a:

Question 8 options:

	parameter
	statistic
	data
	variable

Question 9(1 point)

Crime-related and demographic statistics for 47 US states were collected from government agencies, including the FBI's Uniform Crime Report. One analysis of this data found a strong connection between education and crime indicating that higher levels of education in a community correspond to higher crime rates. Which of the potential problems with samples discussed below could explain this connection?

Question 9 options:

	Confounding
	Self-funded or self-interest study
	Misleading use of data
	Non-response or refusal of subject to participate

Question 10(1 point)

As sample size increases, variability in samples:

Question 10 options:

	Increases
	Remains the same
	Decreases

Question 11(1 point)

The local news is conducting a poll of the residents' opinions regarding a new traffic law that is being proposed. At the end of a news segment, viewers had the opportunity to dial in or use social media to choose whether they agree or disagree with the law. A large sample size was represented, and this poll was repeated again one week later with similar results. When working with this data, which of the following statements best applies?

Question 11 options:

	The surveys are biased because people chose to respond or not.
	Because of the large sample size, the results are most accurate of all members of the community.
	The same sampling methods were used for both polls, demonstrating reliability.

Question 12(1 point)

You are collecting the same data and receive very different results from your classmates. What do you do?

Question 12 options:

	Nothing, it is perfectly fine to have different samples.
	Average your scores with the class mean.
	Reevaluate data-taking methods.

Question 13(1 point)

Round the fraction{"version":"1.1","math":"\frac{845}{98}"}to four decimal places.

Question 13 options:

Question 14(1 point)

Question 14 options:

Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 63 ranked firms.

Age	Frequency	Relative Frequency	Cumulative Relative Frequency
40-44	2
45-49	3
50-54	14
55-59	18
60-64	17
65-69	8
70-74	1

Answer the following questions:

What percentage of CEOs are 60 years or older? Round your answer to the nearest tenth.

%

What is the relative frequency of ages under 50? If responding using a decimal, round your answer to the nearest hundredth.

What is the cumulative frequency for CEOs younger than 55? Round to a whole number. Do not include a decimal.

Question 15(1 point)

Which of the following could be a cumulative frequency graph?

Question 15 options:

Question 16(1 point)

What measurement scale is used in the following example? A satisfaction survey of a social website by number: 1=Very Satisfied 2= Somewhat Satisfied 3=Not Satisfied

Question 16 options:

	Ratio
	Interval
	Nominal
	Ordinal

Question 17(1 point)

What measurement scale is used in the following example? The distance in miles to the closest grocery store

Question 17 options:

	Nominal
	Interval
	Ratio
	Ordinal

Question 18(1 point)

What measurement scale is used in the following example? Incomes measured in dollars.

Question 18 options:

	Interval
	Nominal
	Ordinal
	Ratio

Question 19(1 point)

What measurement scale is used in the following example? Color of your hair.

Question 19 options:

	Ratio
	Nominal
	Interval
	Ordinal

Question 20(1 point)

What measurement scale is used in the following example? The colors of crayons in a 24-crayon box

Question 20 options:

	Nominal
	Interval
	Ordinal
	Ratio