16. Divide the population by certain into homogeneous characteristics subgroups (e.g., age groups or occupation)is an example of Snowball sampling. O True O False
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- The director of the MBA program at Salterdine University wants to develop a procedure to determine which applicants to admit to the MBA program. The director believes that an applicant’s undergraduate grade point average (GPA) and score on the GMAT exam are helpful in predicting which applicants will be good students. To assist in this endeavor, the director asked a committee of faculty members to classify 70 of the recent students in the MBA program into two groups: (1) good students and (2) weak students. The file MBAStudents.xlsm summarizes these ratings, along with the GPA and GMAT scores for the 70 students. What are the coordinates of the centroids for the good students and the weak students? Use XLMiner’s standard data partition command to partition the data into a training set (with 60% of the observations) and validation set (with 40% of the observations) using the default seed of 12345. Use discriminant analysis to create a classifier for this data. How accurate is this…According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. A) Verify that nP0(1-P0)>10 and n< 0.05N (Assume the population sizes is N=40 million) B) State the appropiate null and alternative hypotheses. C) Indicate whether the hypothesis is left, right, or two- tailed.According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. D) Compute the test statistic z0. Round to the nearest hundredth. E) Draw a normal model with the area that represents the P-value shaded. F) Determine and interpret the P-value. What is the conclusion of the hypothesis test?
- 29: A Not for profit Organization (NPO) wants to create a sample of financially backward girl students who are unable to continue their higher education, from the AL Dakhliya governorate. The organization wishes to sponsor the students’ higher education expenses. For this purpose in the first stage, the NGO randomly selects some wilayats from the 8 wilayats in the Al Dakhliya governorate to form a sample and then selects all girl students from the selected wilayats to extend help to them by providing sponsorship for their higher education. What is the method of sampling used here? a. Convenience Sampling b. Stratified sampling c. Cluster Sampling d. Systematic samplingAccording to the Mines and Geosciences Bureau (MGB) Region 6 identified the top 2 districts with the most number of barangays prone to flooding. Moreover, they have also whether these barangays are "very nigh of "high" susceptibility to flooding. In Jaro, nine barangays have "very high" flooding risk. These'are San Isidro, (5) Sambag, (6) Ungka, (7) Lanit, (8) Buntatala, and (9) Tagbak. identified (yCalubihan, (2) Buhang, (3) Dungon-A, (4) The Jaro barangays with 18 "high" flooding risk are (1) Montinola, (2) Taytay Zone 2, (3) Desamparados, (4) Cuartero, (5) Ma. Christina, (6) San Roque, (7) Simon Ledesma, (8) Democracia, (9) Tabuc Suba, (10) Cubay, (11) Balabago, (12) MV Hechanova, (13) Quintin Salas, (14) Tacas, (15) Dungon B., (16) Camalig, (17): Arguelles, and (18) El 98. In Mandurriao, four villages with "very high" susceptibility to flooding are (1) Tabucan, (2) Bakhaw, (3) Buhang Taft North, and (4) Santa Rosa. Barangays deemed with "high" flood exposure risk are (1) San…A state highway commission is considering removing the lane that allows people to pay cash for a toll on a toll road and requiring all people who use the toll road to pay with an electronic transponder that is connected to their car. The commission wants to know whether the proportion of people who live in the northern part of the state and are in favor of removing the cash lane is different from the proportion of people who live in the southern part of the state and are in favor of removing the cash lane. Independent random samples are selected from the northern and southern parts of the state. The table summarizes the responses of those surveyed. Northern Southern Total Remove Cash Lanes 112 98 210 Keep Cash Lanes 89 105 194 Total 201 203 404 Which of the following is closest to the pp-value of the appropriate test to investigate whether the proportion of people living in the northern part of the state who are in favor of removing the cash lane is different from…
- 1. The College of Science surveys its graduating students to determine the starting salaries and the job market for the new graduates. The population of graduating students according to major is recorded as follows: BS Bio (85), BSM- CS (102), BSM- BA (78), and BSM- AS (75). If you would like to select 100 samples, how large must a sample be for each major using proportionate allocation? 2. The event organizer plans to give 9 complimentary tickets to the presidents of the school organizations so they can attend the upcoming event for free. Since the tickets will be given only to 9 out of 50 presidents, the event organizer decided to choose a systematic random sampling procedure. Determine k (sampling interval). Let the random start be at number three (3). List the number of the first three samples.4. The number of passengers (in thousands) for the leading U.S. passenger airlines in 2004 is indicated below. 91,570 86,755 81,066 70,786 55,373 42,400 40,551 21,119 16,280 14,869 13,659 13,417 13,170 12,632 11,731 10,420 10,024 9,122 7,041 6,954 6,406 6,362 5,930 5,585 5,427• Use the data to construct a grouped frequency distribution and a cumulative frequency distribution with a reasonable number of classes and comment on the shape of the distribution using graph.Suppose we observe 84 alcoholics with cirrhosis of theliver, of whom 29 have hepatomas—that is, liver-cell carcinoma.Suppose we know, based on a large sample, that therisk of hepatoma among alcoholics without cirrhosis of theliver is 24%. 5.52 What is the smallest number of hepatomas that wouldhave to be observed among the alcoholics with cirrhosis ofthe liver for the hepatoma experience in this group to differfrom the hepatoma experience among alcoholics withoutcirrhosis of the liver? (Hint: Use a 5% probability of gettinga result at least as extreme to denote differences betweenthe hepatoma experiences of the two groups.)