PORTAGE LEARNING MATH 110 Module 9 Exam - VERIFIED 2022

Portage Learning MATH 110 Module 9 Exam



M9: Exam- Requires Respondus LockDown Browser

• Due No due date


• Points 35


• Questions 4


• Time Limit 90 Minutes


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Attempt History

Attempt Time Score

LATEST Attempt 1 83 minutes 32 out of 35

Score for this quiz: 32 out of 35

Submitted Jul 27 at 5:50pm

This attempt took 83 minutes.


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.




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, 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.)




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