Question 10 A recruiting firm finds that 20% of the applicants for a particular sales position are fluent in both English and Spanish. Applicants are selected at random from a very large pool and interviewed sequentially. Suppose the first applicant who is fluent in both English and Spanish always gets an offer. Suppose each interview costs $150. Find the expected value of the total interview cost. O $900 ο ο ο ο O $750 O $600 O $300
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Suppose a recruiting firm finds that of the applicants for a particular sales position are fluent in both English and Spanish.
Applicants are selected at random from a very large pool and interviewed sequentially and the first applicant who is fluent in both English and Spanish always gets an offer.
Suppose each interview costs .
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- The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.5 6.6 6.7 6.8 7.1 7.2 7.4 7.8 7.8 7.8 Bank B 4.1 5.3 5.9 6.2 6.7 7.6 7.6 8.6 9.2 10.0 A. Construct a 90%confidence interval for the population standard deviation σ at Bank A _____min <o Bank A < ______min…The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.4 6.6 6.7 6.8 7.1 7.3 7.5 7.7 7.7 7.7 Bank B 4.2 5.5 5.7 6.2 6.7 7.8 7.8 8.5 9.3 10.0 Click the icon to view the table of Chi-Square critical values. Construct a 95% confidence interval for the population standard deviation o at Bank A. min< OBank A min (Round two decimal places as needed.) Construct a 95% confidence interval for the population standard deviation o at Bank B. min < OBank B < min (Round to two decimal places as needed.) Interpret the results found in the previous parts. Do the confidence intervals suggest a difference in the variation among waiting times? Does the single-line system or the multiple-line system seem to be a better arrangement? O A. The…Chapter 11 A study was being done on sleep and dreams. One aspect of this study was to see if the proportion of women who remember their dreams is greater than the proportion of men who remember their dreams. To test this, they surveyed 146 women and found that 65 of them regularly remember their dreams. They then surveyed 140 men and found that 58 regularly remember their dreams. Test the claim and find the P-Value. O 0.701 O 0.299 O 0.368 O 0.632
- (3) The Municipal Social Welfare and Development surveyed the families in Barangay Uno. There are fifteen families on the said barangay, and they asked for the number of the family members and the gross monthly income of them: Family Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 = No. of Family Members 3 5 Interpretation: The relationship is 6 3 2 7 10 9 3 5 7 5 3 2 4 Using the formula below, check whether the said variables are related to each other by getting the correlation coefficient. Gross Monthly Income 56232 45700 32024 31645 15650 56789 72100 64345 36432 23123 45234 53128 24563 34134 28954 n(Σxy) - (Σχ)(Σy) V[n Σx2 - (Σκ)2][nEy2 - (Σy)] andIn a certain class of 25 students, 12% received A’s, 30% received B’s, 42% received C’s, and 12% received D’s. How many students failed the class?On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game. Assuming everyone present is sitting in a seat, what percentage of seats in the stadium are empty?
- The university administrator wants a quick estimate of the average course size, i.e. how many students are enrolled in one course on average. However, since he does not want the faculty to find out about his interest, he has decided to use the students as his help. He has decided to randomly select 100 students to find out and report to him the number or numbers of students in his course or courses. Thus, his estimate of the average course size is the average of the numbers reported by the students.(a) Does such a procedure serve his purpose?(b) If you answered yes to the previous question, explain why. If you answered no to the previous question, present a more efficient way.Chapter 11 2. Directions: Show all your work. Indicate clearly the methods you use, because you will be graded on the correctness of your methods as well as on the accuracy of your results and explanation. A random sample of 200 students was selected from a large college in the United States. Each selected student was asked to give his or her opinion about the following statement. "The most important quality of a person who aspires to be the President of the United States is a knowledge of foreign affairs." Each response was recorded in one of five categories. The gender of each selected student was noted. The data are summarized in the table below. Page 2 of 4 Response Category Strongly Somewhat Disagree Male 10 Disagree 15 Neither Agree nor Disagree Somewhat Strongly Agree Agree 15 25 25 Female 20 25 25 25 15 Is there sufficient evidence to indicate that the response is dependent on gender? Provide statistical evidence to support your conclusion. AP StatisticsThe values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.3 6.6 6.7 6.8 7.1 7.3 7.5 7.8 7.8 7.8 Bank B 4.2 5.5 5.9 6.3 6.7 7.7 7.7 8.5 9.3 10.0 Click the icon to view the table of Chi-Square critical values. Construct a 90% confidence interval for the population standard deviation o at Bank A. 7:6
- A raffle has a grand prize of $15000 with the second prize of $900. If each ticket costs $2 and 9200 tickets are sold, what are the expected winnings for a ticket buyer? Express to at least three decimal place accuracy in dollar form (as opposed to cents).The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.4 6.6 6.7 6.8 7.1 7.3 7.6 7.9 7.9 7.9 Bank B 4.2 5.4 5.8 6.2 6.7 7.6 7.6 8.5 9.2 10.0 Click the icon to view the table of Chi-Square critical values. Construct a 99% confidence interval for the population standard deviation o at Bank A. 0.36 minChapter 11 2. Directions: Show all your work. Indicate clearly the methods you use, because you will be graded on the correctness of your methods as well as on the accuracy of your results and explanation. A random sample of 200 students was selected from a large college in the United States. Each selected student was asked to give his or her opinion about the following statement. "The most important quality of a person who aspires to be the President of the United States is a knowledge of foreign affairs." Each response was recorded in one of five categories. The gender of each selected student was noted. The data are summarized in the table below. Page 2 of 4 Response Category Strongly Somewhat Disagree Male 10 Disagree 15 Neither Agree nor Disagree Somewhat Strongly Agree Agree 15 25 25 Female 20 25 25 25 15 Is there sufficient evidence to indicate that the response is dependent on gender? Provide statistical evidence to support your conclusion. AP StatisticsSEE MORE QUESTIONS