MATH 110 Module 9 Exam (GRADED A+) Questions and Answers- Portage Learning

MATH 110 Module 9 Exam (GRADED A+) Questions and Answers- Portage Learning M9: Exam- Requires Respondus LockDown Browser •Due No due date •Points 35 •Questions 4 •Time Limit 90 Minutes •Requires Respondus LockDown Browser This quiz is currently locked. 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 5 / 5 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. 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 5 / 5 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 10 / 10 pts You may find the following files helpful throughout the exam: Statistics_Equation_Sheet (Links to an external site.)