PLEASE HELP 1. What is the explanatory variable in the following situation? The
ID: 3128920 • Letter: P
Question
PLEASE HELP
1. What is the explanatory variable in the following situation?
The number of lamps that are on in a household.
The amount (in dollars) of an electrical bill.
a. there is no such thing as an explanatory variable.
b. the number of lamps that are on in a household
c. the amount (in dollars) of an electrical bill.
2. Find the slope of the line for the data in the following table.
Number of minutes of exercise
Heart rate(in beats per minute)
3
71
5
75
15
95
a. 3/2
b. 2
c. -2
d. ½
3. Select the best estimate for the correlation coefficient r.
a. 100
b. 0
c. none
d. 1
e. -1
4. What is the slope of the following line?
a. 3/2
b. 5/16
c. none
d. 2/3
e. 3/2
5. The graph below is called a ___________.
a. none
b. pointplot
c. dotplot
d. histogram
e. scatterplot
6. Select the value that is not a possible value for a correlation coefficient r.
a. -1
b. -0.2
c. 0.2
d. 0
e. 1.2
7. A researcher would like to study if number of hours spent watching TV has an effect on the grade a student earns on an exam. The number of hours spent watching TV is the __________ variable and the score on the exam is the _______ variable.
a. response, explanatory
b. extraordinary, ordinary
c. explanatory, response
d. dependent, independent
8. Select the false statement.
a. all of the other statements are true
b. the slope of a horizontal line is 0.
c. slope can be negative, positive or 0
d. to find the slope, the difference of two y (dependent variable) values is in the numerator.
e. slope cannot be greater than 1.
9. Does the following line have a positive slope, a negative slope, or a slope of 0?
a. positive slope
b. negative slope
c. slope of 0
10. Which correlation coefficient is most likely to represent the following data?
a. 0
b. -0.76
c. 0.76
d. none
e. 0.36
Number of minutes of exercise
Heart rate(in beats per minute)
3
71
5
75
15
95
Explanation / Answer
What is the explanatory variable in the following situation?
The number of lamps that are on in a household.
The amount (in dollars) of an electrical bill.
Answer:
c. the amount (in dollars) of an electrical bill.
2. Find the slope of the line for the data in the following table.
Number of minutes of exercise
Heart rate(in beats per minute)
3
71
5
75
15
95
Answer:
b. 2
3. Select the best estimate for the correlation coefficient r.
Answer:
d. 1
4. What is the slope of the following line?
a. 3/2
b. 5/16
c. none
d. 2/3
e. 3/2
5. The graph below is called a ___________.
a. none
b. pointplot
c. dotplot
d. histogram
e. scatterplot
I cant see any line and any Graph. Please specify the line or graph for 4th and 5th.
6. Select the value that is not a possible value for a correlation coefficient r.
Answer:
e. 1.2
7. A researcher would like to study if number of hours spent watching TV has an effect on the grade a student earns on an exam. The number of hours spent watching TV is the __________ variable and the score on the exam is the _______ variable.
Answer :
d. dependent, independent
8. Select the false statement.
Answer :
e. slope cannot be greater than 1.
9. Does the following line have a positive slope, a negative slope, or a slope of 0?
a. positive slope
b. negative slope
c. slope of 0
10. Which correlation coefficient is most likely to represent the following data?
a. 0
b. -0.76
c. 0.76
d. none
e. 0.36
I can’t see any line and data for thw question 9 and 10
Number of minutes of exercise
Heart rate(in beats per minute)
3
71
5
75
15
95
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