In general, 60 beats per minute (bpm) is a heart rate that isconsidered too slow for an adult when at rest and 100 bpm isconsidered too high. As one way of measuring the stress of Canadianair traffic controllers, heart rates of 173 randomly selected airtraffic controllers were measured across Canada. Of this sample ofair traffic controllers, 47 had a resting heart rate over 100 bpm.What is the true proportion of air traffic controllers inCanada with resting heart rates over 100 bpm? What statisticalprocedure should be used to answer this research question?

A. A one-sample t-confidence interval for means

B. A one-sample z-confidence interval for proportions

C. A one-sample z-test for proportions

D. A one-sample t-test for means

Question 2

A group of 26 Canadians were randomly selected among a localgroup of fitness enthusiasts to participate in an innovativefitness program to lower their heart rate. After four months thegroup was evaluated to identify if their average heart rate waslower than the national average of 72 beats/minute. The mean heartrate for the group was 68.5 bpm with a standard deviation of 6 bpm.Is there sufficient evidence to believe that the average heart ratefor Canadians who participate in this innovative fitness program islower than the national average heart rate? What statisticalprocedure should be used to answer this research question?

A. A one-sample z-confidence interval for proportions

B. A one-sample t-confidence interval for means

C. A one-sample t-test for means

D. A one-sample z-test for proportions

The following situation applies to the next two questions:

A researcher wanted to learn more about the relationship betweenwhether or not a student getting less than 8 hours of sleep thenight before a test determines whether or not they pass their testthe next day.

Question 3

What is the explanatory variable in this study?

A. The number of students who passed their test

B. Whether or not a student got less than 8 hours of sleep thenight before a test

C. The number of students who got less than 8 hours of sleep thenight before a test

D. Whether or not the student passed his/her test

Question 4

What type of relationship is this?

A. Q --> C

B. C --> C

C. Q --> Q

D. C --> Q

The following situation applies to the next three questions:

A group of boys believe that there is a relationship between theact of sending flowers to a girl and texts received as a result. Astudy was carried out in which a sample of girls were asked whetherthey received any flowers and how many texts they sent inresponse.

Question 5

What type of variable is the explanatory variable?

A. Categorical

B. Quantitative

Question 6

What type of variable is “number of texts sent in response?”

A. Quantitative

B. Categorical

Question 7

What type of visual display should be used to summarize thisdata?

A. Histogram

B. Dot plot

C. Side-by-side boxplots

D. Bar chart

Question 8

How do the medians for IQ scores compare for the boxplotsabove?

A. Cannot be determined from the given information

B. The median for male IQ scores is the same as the median forfemale IQ scores

C. The median for male IQ scores is less than the median forfemale IQ scores

D. The median for male IQ scores is greater than the median forfemale IQ scores

The following situation applies to the next two questions:

Two treatments were applied to two groups of children – onegroup receiving the active treatment, which included them coveringa unit on shapes. The other group received the passive treatment,which did not include a unit on shapes. The number of correct shapeidentifications made by each child was recorded as theresponse.

Question 9

What is the response variable?

A. Number of children receiving each treatment

B. Type of treatment received

C. Whether or not the child could identify the shapescorrectly

D. Number of shapes identified

Question 10

What type of variable is the explanatory variable?

A. Quantitative

B. Categorical

Answer rating: 100% (QA)

Question 1 The correct answer is C A onesample ztest for proportions The question is asking about the true proportion of air traffic controllers in Ca... View the full answer