Question 154 pts
Match the best answer on the right to the item on the left.
Group of answer choices
Left skewed distribution
P(A|B)
n
s
Data is collected from every member of the population
Data is collected from a subset of the population
Data is collected by watching the behavior of entities in a sample
Data is collected by imposing a treatment on entities in a sample and examining the results
Data is collected as a result of computer modeling
Data is collected by asking a series of questions (e.g. questionnaire)
α
r
µ
q = 1 – p
x₁, x₂, x₃
Normal distribution
A measure of the spread or variability of the data set
Sample does not fairly represent the population
Flag question: Question 2
Question 24 pts
A company feels it’s soda pop filling machine is not working properly. It is supposed to fill each cup with 12 fluid ounces of soda. They think it is not putting the correct amount of soda in the cups. Which statistical method would be best to use in this situation?
Group of answer choices
Confidence interval
Hypothesis test
Conditional probability
Regression analysis
Flag question: Question 3
Question 34 pts
A school district wants to identify factors that may be affecting how well the students are doing based on their grade point averages. Which statistical method would be best to use in this situation?
Group of answer choices
Regression analysis
Hypothesis test
Confidence interval
Pareto chart
Flag question: Question 4
Question 44 pts
A senator is thinking about running for president. But she will only do so if more than 60% of the voters view her favorably. She gathers some data to see if she has this level of support. Which statistical method would be best for her to use?
Group of answer choices
Regression analysis
Binomial distribution
Confidence interval
Hypothesis test
Flag question: Question 5
Question 54 pts
A company wants to estimate how long it will take to produce 100 units of a product based on production rates in the past. Which statistical method would be most effective?
Group of answer choices
Confidence interval
Hypothesis test
Regression analysis
Correlation analysis
Flag question: Question 6
Question 64 pts
The CDC wants to determine factors that affect the COVID-19 rates. Which statistical method would be most appropriate?
Group of answer choices
Confidence interval
Regression analysis
Hypothesis test
Binomial distribution
Flag question: Question 7
Question 74 pts
A consumer group feels that the average person spends fewer than 10 dollars each month on tooth care products. They decide to use hypothesis testing to see if they are right. Which of the following would be the alternative hypothesis?
Group of answer choices
Ha: µ < 10
Ha: µ > 10
Ha: µ ≠ 10
Ha: µ = 10
Flag question: Question 8
Question 84 pts
A scientist has come up a new fertilizer for roses. She feels that with the use of this fertilizers, the average blooming time span will increase. But she feels the time span will still be 55 days or more. You don’t agree with the scientist. Which of the following would be the alternative hypothesis to test your belief?
Group of answer choices
Ha: µ ≠ 55
Ha: µ ≥ 55
Ha: µ < 55
Ha: µ > 55
Flag question: Question 9
Question 94 pts
A teacher wants to track the number of books students have read each week for the past 20 weeks. Which of the following graphs might be most effective to use?
Group of answer choices
Pie chart
Time series graph
Pareto chart
Scatter plot
Flag question: Question 10
Question 104 pts
A basketball coach want to study scoring by players who are grouped by the position they play (e.g. guard, forward, etc.). Which of the following graphs would be the best for displaying this data?
Group of answer choices
Bar chart
Scatter plot
Histogram
Pie chart
Flag question: Question 11
Question 114 pts
Quality is important when making cleaning products. The quality control department wants to test throughout each production day, select every 100th product produces. What type of sample is this an example of?
Group of answer choices
Systematic sample
Random sample
Stratified sample
Cluster sample
Flag question: Question 12
Question 125 pts
To study the effectiveness of patient care in US hospitals, an organization focused only on patients in hospitals in urban areas. Would you expect the results to be biased? Why or Why not?
Group of answer choices
No, as all patients in urban areas have the same expectations as other groups
Yes, as patients in hospitals outside urban areas may have different expectations on patient care than others
Yes, as patients may feel pressure to respond positively about patient care so as not to upset their doctor
No, as patient in hospitals outside of urban areas likely feel the same as patients in urban areas
Yes, as hospitals outside of the United States were likely excluded from the study
Flag question: Question 13
Question 135 pts
The residents of State A complain that their property taxes are too high compared with resident with State B. Which of the following would NOT be a justification for the higher property taxes in state A?
Group of answer choices
Voting day in state A is Tuesday compared to Thursday in state B
Quality of school system
Quality of roads
The number of people that live in the state
Property values
Flag question: Question 14
Question 145 pts
To study the interest in sports of junior high kids, an organization focused on those kids being most active during the outside time of the day. Would you expect the results to be biased? Why or why not?
Group of answer choices
No, sports are universally of interest
Yes, as inactive kids may have different opinions from the others
No, all students who are in sports, are likely already in after-school activities
No, as inactive kids likely feel the same as the active kids
Yes, the wording of the questions might push kids to a specific answer
Flag question: Question 15
Question 155 pts
A study wants to show that the most expensive cars get stopped for speeding more often. Which of the following issues is most likely to bias the results?
Group of answer choices
The state the car comes from
The functionality of the radar gun used for gauging speed
The gas mileage of the various cars
The age of the tires on the cars
Expensive cars draw more attention than cheaper cars
Flag question: Question 16
Question 164 pts
Imagine you read poll results that found that 49% of individuals liked buying food at movies, while 42% of individuals did not like buying food at movies. This poll had an error of +/- 4%. Based on this result, can one say that in the population, more people clearly like buying food at the movies?
Group of answer choices
No, as the poll results show most people do not like to buy food at the movies
No, as polls cannot reflect the population
Yes, as the confidence intervals for the two groups do not overlap
No, as the confidence intervals for the two groups overlap
Yes, as that had the higher percentage in the poll
