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courses/_317732_1/cl/outline * Question Completion Status: QUESTION 1 0.5 points Save Answer Suppose we wish to test HO: 553 vs Ha: > 53. What will result if we conclude that the mean is greater than 53 when its true value is really 55? We have made a Type 1 error We have made a correct decision We have made a Type II error O None of the above are correct QUESTION 2 0.5 points Save Answer Use the following information to answer the next 3 questions: According to a recent study survey of local public utility departments, 31% of customers do not pay their utility bills on time. The city of Fayetteville would like to know if their customers are more likely to pay their utility bills on time because they have an online payment system. They track 100 randomly selected customers for 6 months and find that, at the end of 6 months, 72 out of 100 of the customers consistently paid their bills on time. Determine if there is evidence (at the 0.10 significance level that the proportion of late-paying Fayetteville customers is less than the national average. For this scenario, what would be the appropriate set of hypotheses? : 31: : , 31 HO: T2 28; H1: TT 28 O HOSTS 28: H15 > 28 Click Save and Submit to save and submit Click Save All Arister to see all answers. Save All Are Save and it 73F Sunny 3:29 PMC ses/_317732_1/cl/outline # Question Completion Status QUESTION 3 0.5 points Save Answer What is the critical value for this question? O 1.645 0 1.28 0 -1.28 0 -1.645 QUESTION 4 0.5 points Based on your calculations, what do you conclude? O Reject Ho: conclude that a lower proportion of Fayetteville residents pay their bills tato Reject Ho; conclude that a higher proportion of Fayetteville residents pay their bills late O Fail to roject Ho: conclude that a lower proportion of Fayetteville residents pay their bils lato Fail to reject Ho; conclude that there is no difference between the proportion of Fayetteville residents and US residents who pay their bills late QUESTION 5 0.5 points Save Aww Use the following information for the next 5 questions: urses/_317732_V/cl/outline * * Question Completion Status: Use the following information for the next 5 questions: Razorback Realtors (RR) has apartment complexes in Fayetteville that primarily rent to University of Arkansas students. Historically, 85% of tenants pay their rent on time. RR wants to be paid on time but also wants to help students improve their credit score. Since late payments negatively impact a tenant's credit score, RR would like to decrease late payments in the future. A new program was implemented where if a tenant was not late with their rent during a six-month period, then RR would be give them a $50 Wal-Mart gift card. After six months of the program, only 6 of 50 tenants paid their rent late. Using a 10% level of significance, can RR conclude that the new program resulted in a decrease in late payments? Which type of graph would be most appropriate for displaying the variable "On-time Payment", possible values are "YES"=1, "NO"=0? histogram pie chart O scatterplot O None of above QUESTION 6 0.5 points Save Ant For this scenario, which would be the proper set of hypotheses? O HOST 2 44, H 12 6 O HO.15, H715 Click Save and Submit to save and submit. Click Save All Answers to sou all arter Save All Art Save and Submit 73F Sunny d 3:29 PM Sesy Outine 4 Question Completion Status: QUESTION 7 0.5 points Save Answer What is the value of the test statistic? -1.41 0 -0.59 O 0.59 O 1.41 QUESTION 8 0.5 points Save Answer What would be the correct decision? Fail to foject Hoi conclude that the proportion of late payments is significantly lower after the program was implemented Roject Ho: conclude that the proportion of late payments is significantly lower after the program was Implemented Roject Ho: conclude that the proportion of late payments is not significantly lower after the program was implemented Fail to reject Ho: conclude that the proportion of late payments is not significantly lower after the program was implemented QUESTION 9 0.5 points Save Answer Click Save and Submit to save and submut. Click Save All Ansters to save all enters Save All Antwer Save and Submit 73F Sunny ma 3:29 PM w Question Completion Status QUESTION 9 Which scenario below best describe a Type 1 error? O RR conclude that there is a reduced late payment after the new program was implemented when indeed the current late payment rate is lower O RR conclude that there is a reduced late payment after the new program was implemented when indeed the current late payment rate is not lower RR conclude that the late payment has not been reduced after the new program was implemented when indeed the current late payment rate is lower O RR conclude that the late payment has not been reduced after the new program was implemented when indeed the current late payment rate is not lower 0 e QUESTION 10 Use the following scenario for the next 4 questions. In 2001 the financial aid office took a mean time of 5 days from the first day of classes to process refunds. Since then calculating the financial accounts of students is becoming an increasingly complex process as more courses charge course specific fees, out of state tuition waivers are offered to more students, and a larger variety of scholarship types are being awarded. A university professor suspects the increasing complexity in student financial accounts is causing student refunds to be delayed and decides to sample her students to see if this appears to be the case. She sends a survey to all her students this semester asking how many days from the first day of classes it took to get a financial aid refund. She gets 81 responses to her survey, and the sample mean and standard deviation were 6.2 and 3.7 days, respectively. What is the test statistic from this sample? O 2.92 O -2.92 @ -0.324 0.324 Click Save and Submit to save and submit. Click Save AILANRANTS to see all answers Save As AS Question Completion Status: 0.5 poi QUESTION 11 What is the critical value for this hypothesis test at the .05 significance level? O t = 1.664 O z = 1.645 O t= +1.99 or -1.99 O z = +1.96 or -1.96 QUESTION 12 0.5 poin At the .05 significance level, what should she conclude? O Reject the null and conclude the current processing time is significantly longer Fail to reject the null and conclude the current processing time is not significantly longer Reject the null and conclude the current processing time is not significantly longer Fail to reject the null and conclude the current processing time is significantly longer 0.5 points QUESTION 13 Based on the sample of 81 respondents, the interval estimates of the average days to process refunds using a Stunds 90% confidence level is Clip Sushi and hit (lice Save All Anssers to swall ansu Save All Answers Question completion Status QUESTION 13 0.5 p Based on the sample of 81 respondents, the interval estimates of the average days to process refunds using a 90% confidence level is O 6.2 +1.645x 3.7 O 6.2 + 1.28 0.41 O 6.2 t 1.2922% 0.41 O 6.2 1.6641% 0.41 QUESTION 14 0.1 points (Extra Cre Extra credit: Use the following information to answer the next 3 questions: Sally Soooie believes University of Arkansas students are more generous than students at other SEC schools and believes that this generosity will lead them to sign up to be organ donors more frequently. She takes a random survey of 100 U of A students (Sample 1) and finds that 78 of them have signed the form to be organ donors. A random sample of students from Vanderbilt (Sample 2) found 62 out of 100 are registered organ donors. What is the 90% confidence interval for the proportion of Vanderbilt students that are organ donors based on this sample? 0 (0.517, 0.715) 0 (0.487, 0.742) (0.540, 0.700) O (0.551, 0.685) Chick Save and Submit to save and submit. Click Save All Answers to save all answers Save As Answers 73F Sunny courses/_317732_1/cl/outline * Question Completion Status: QUESTION 1 0.5 points Save Answer Suppose we wish to test HO: 553 vs Ha: > 53. What will result if we conclude that the mean is greater than 53 when its true value is really 55? We have made a Type 1 error We have made a correct decision We have made a Type II error O None of the above are correct QUESTION 2 0.5 points Save Answer Use the following information to answer the next 3 questions: According to a recent study survey of local public utility departments, 31% of customers do not pay their utility bills on time. The city of Fayetteville would like to know if their customers are more likely to pay their utility bills on time because they have an online payment system. They track 100 randomly selected customers for 6 months and find that, at the end of 6 months, 72 out of 100 of the customers consistently paid their bills on time. Determine if there is evidence (at the 0.10 significance level that the proportion of late-paying Fayetteville customers is less than the national average. For this scenario, what would be the appropriate set of hypotheses? : 31: : , 31 HO: T2 28; H1: TT 28 O HOSTS 28: H15 > 28 Click Save and Submit to save and submit Click Save All Arister to see all answers. Save All Are Save and it 73F Sunny 3:29 PMC ses/_317732_1/cl/outline # Question Completion Status QUESTION 3 0.5 points Save Answer What is the critical value for this question? O 1.645 0 1.28 0 -1.28 0 -1.645 QUESTION 4 0.5 points Based on your calculations, what do you conclude? O Reject Ho: conclude that a lower proportion of Fayetteville residents pay their bills tato Reject Ho; conclude that a higher proportion of Fayetteville residents pay their bills late O Fail to roject Ho: conclude that a lower proportion of Fayetteville residents pay their bils lato Fail to reject Ho; conclude that there is no difference between the proportion of Fayetteville residents and US residents who pay their bills late QUESTION 5 0.5 points Save Aww Use the following information for the next 5 questions: urses/_317732_V/cl/outline * * Question Completion Status: Use the following information for the next 5 questions: Razorback Realtors (RR) has apartment complexes in Fayetteville that primarily rent to University of Arkansas students. Historically, 85% of tenants pay their rent on time. RR wants to be paid on time but also wants to help students improve their credit score. Since late payments negatively impact a tenant's credit score, RR would like to decrease late payments in the future. A new program was implemented where if a tenant was not late with their rent during a six-month period, then RR would be give them a $50 Wal-Mart gift card. After six months of the program, only 6 of 50 tenants paid their rent late. Using a 10% level of significance, can RR conclude that the new program resulted in a decrease in late payments? Which type of graph would be most appropriate for displaying the variable "On-time Payment", possible values are "YES"=1, "NO"=0? histogram pie chart O scatterplot O None of above QUESTION 6 0.5 points Save Ant For this scenario, which would be the proper set of hypotheses? O HOST 2 44, H 12 6 O HO.15, H715 Click Save and Submit to save and submit. Click Save All Answers to sou all arter Save All Art Save and Submit 73F Sunny d 3:29 PM Sesy Outine 4 Question Completion Status: QUESTION 7 0.5 points Save Answer What is the value of the test statistic? -1.41 0 -0.59 O 0.59 O 1.41 QUESTION 8 0.5 points Save Answer What would be the correct decision? Fail to foject Hoi conclude that the proportion of late payments is significantly lower after the program was implemented Roject Ho: conclude that the proportion of late payments is significantly lower after the program was Implemented Roject Ho: conclude that the proportion of late payments is not significantly lower after the program was implemented Fail to reject Ho: conclude that the proportion of late payments is not significantly lower after the program was implemented QUESTION 9 0.5 points Save Answer Click Save and Submit to save and submut. Click Save All Ansters to save all enters Save All Antwer Save and Submit 73F Sunny ma 3:29 PM w Question Completion Status QUESTION 9 Which scenario below best describe a Type 1 error? O RR conclude that there is a reduced late payment after the new program was implemented when indeed the current late payment rate is lower O RR conclude that there is a reduced late payment after the new program was implemented when indeed the current late payment rate is not lower RR conclude that the late payment has not been reduced after the new program was implemented when indeed the current late payment rate is lower O RR conclude that the late payment has not been reduced after the new program was implemented when indeed the current late payment rate is not lower 0 e QUESTION 10 Use the following scenario for the next 4 questions. In 2001 the financial aid office took a mean time of 5 days from the first day of classes to process refunds. Since then calculating the financial accounts of students is becoming an increasingly complex process as more courses charge course specific fees, out of state tuition waivers are offered to more students, and a larger variety of scholarship types are being awarded. A university professor suspects the increasing complexity in student financial accounts is causing student refunds to be delayed and decides to sample her students to see if this appears to be the case. She sends a survey to all her students this semester asking how many days from the first day of classes it took to get a financial aid refund. She gets 81 responses to her survey, and the sample mean and standard deviation were 6.2 and 3.7 days, respectively. What is the test statistic from this sample? O 2.92 O -2.92 @ -0.324 0.324 Click Save and Submit to save and submit. Click Save AILANRANTS to see all answers Save As AS Question Completion Status: 0.5 poi QUESTION 11 What is the critical value for this hypothesis test at the .05 significance level? O t = 1.664 O z = 1.645 O t= +1.99 or -1.99 O z = +1.96 or -1.96 QUESTION 12 0.5 poin At the .05 significance level, what should she conclude? O Reject the null and conclude the current processing time is significantly longer Fail to reject the null and conclude the current processing time is not significantly longer Reject the null and conclude the current processing time is not significantly longer Fail to reject the null and conclude the current processing time is significantly longer 0.5 points QUESTION 13 Based on the sample of 81 respondents, the interval estimates of the average days to process refunds using a Stunds 90% confidence level is Clip Sushi and hit (lice Save All Anssers to swall ansu Save All Answers Question completion Status QUESTION 13 0.5 p Based on the sample of 81 respondents, the interval estimates of the average days to process refunds using a 90% confidence level is O 6.2 +1.645x 3.7 O 6.2 + 1.28 0.41 O 6.2 t 1.2922% 0.41 O 6.2 1.6641% 0.41 QUESTION 14 0.1 points (Extra Cre Extra credit: Use the following information to answer the next 3 questions: Sally Soooie believes University of Arkansas students are more generous than students at other SEC schools and believes that this generosity will lead them to sign up to be organ donors more frequently. She takes a random survey of 100 U of A students (Sample 1) and finds that 78 of them have signed the form to be organ donors. A random sample of students from Vanderbilt (Sample 2) found 62 out of 100 are registered organ donors. What is the 90% confidence interval for the proportion of Vanderbilt students that are organ donors based on this sample? 0 (0.517, 0.715) 0 (0.487, 0.742) (0.540, 0.700) O (0.551, 0.685) Chick Save and Submit to save and submit. Click Save All Answers to save all answers Save As Answers 73F Sunny