MATH 110 MODULE 9 EXAM PORTAGE LEARNING
MATH 110 MODULE 9 EXAM PORTAGE LEARNING
Question 1
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
standard normal table (Links to an external site.)
t-table (Links to an external site.)
Critical_values_chart (Links to an external site.)
Suppose you have 28 data points and you calculate the sample correlation coefficient and find that r = .
35. Can you be 95% confident that a linear relation exists between the variables? If so, is the relation
positive or negative? Justify you answer.
This study source was downloaded by 100000841138256 from CourseHero.com on 07-27-2022 03:17:44 GMT -05:00
https://www.coursehero.com/file/66560580/M9Examdocx/
, MATH 110 MODULE 9 EXAM PORTAGE LEARNING
Your Answer:
For this problem:
n=28 amd for 95% confidence value is: 0.37389
r=.35 and IrI=.35
Since the absolute value of r=.35 is less than critical value of 0.37389, there is no relation exist.
Note that for n=28 and 95% we get a value from the chart of .37389. The absolute of r is |r|=.35,
which is below .37389. So no linear relation exists.
Question 2
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
standard normal table (Links to an external site.)
t-table (Links to an external site.)
Critical_values_chart (Links to an external site.)
Suppose you have 34 data points and you calculate the sample correlation coefficient and find that r = - .
35. Can you be 95% confident that a linear relation exists between the variables? If so, is the relation
positive or negative? Justify you answer.
Your Answer:
For this problem:
n=34 and for 95% confidence value from the chart is: .33879
r=-.35 and IrI =.35. So, .35 is above .33879 and we have negative linear relation exist.
Note that for n=34 and 95% we get a value from the chart of .33879. The absolute of r is |r|=.35,
which is above .33879. So a negative linear relation exists.
Question 3
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
This study source was downloaded by 100000841138256 from CourseHero.com on 07-27-2022 03:17:44 GMT -05:00
https://www.coursehero.com/file/66560580/M9Examdocx/
MATH 110 MODULE 9 EXAM PORTAGE LEARNING
Question 1
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
standard normal table (Links to an external site.)
t-table (Links to an external site.)
Critical_values_chart (Links to an external site.)
Suppose you have 28 data points and you calculate the sample correlation coefficient and find that r = .
35. Can you be 95% confident that a linear relation exists between the variables? If so, is the relation
positive or negative? Justify you answer.
This study source was downloaded by 100000841138256 from CourseHero.com on 07-27-2022 03:17:44 GMT -05:00
https://www.coursehero.com/file/66560580/M9Examdocx/
, MATH 110 MODULE 9 EXAM PORTAGE LEARNING
Your Answer:
For this problem:
n=28 amd for 95% confidence value is: 0.37389
r=.35 and IrI=.35
Since the absolute value of r=.35 is less than critical value of 0.37389, there is no relation exist.
Note that for n=28 and 95% we get a value from the chart of .37389. The absolute of r is |r|=.35,
which is below .37389. So no linear relation exists.
Question 2
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
standard normal table (Links to an external site.)
t-table (Links to an external site.)
Critical_values_chart (Links to an external site.)
Suppose you have 34 data points and you calculate the sample correlation coefficient and find that r = - .
35. Can you be 95% confident that a linear relation exists between the variables? If so, is the relation
positive or negative? Justify you answer.
Your Answer:
For this problem:
n=34 and for 95% confidence value from the chart is: .33879
r=-.35 and IrI =.35. So, .35 is above .33879 and we have negative linear relation exist.
Note that for n=34 and 95% we get a value from the chart of .33879. The absolute of r is |r|=.35,
which is above .33879. So a negative linear relation exists.
Question 3
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet (Links to an external site.)
This study source was downloaded by 100000841138256 from CourseHero.com on 07-27-2022 03:17:44 GMT -05:00
https://www.coursehero.com/file/66560580/M9Examdocx/
