A university is offering 3 language classes: one in Spanish (Sp), one in French (Fr), and one in German (Ge). The breakdown of the students enrolled for the language course by class (F: freshman, So: sophomore, J: junior, Se: senior) is shown in the two-way classification table. Language Class F So J Se Spanish 50 115 70 83 French 215 75 118 283 German 300 207 205 124 A student is enrolled in the course

A university is offering 3 language classes: one in Spanish (Sp), one in French (Fr), and one in German (Ge). The breakdown of the students enrolled for the language course by class (F: freshman, So: sophomore, J: junior, Se: senior) is shown in the two-way classification table. Language Class F So J Se Spanish 50 115 70 83 French 215 75 118 283 German 300 207 205 124 A student is enrolled in the course

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The number of sick days taken (per month) by 200 factory workers is summarized below. Number of Days 0-5 6-10 11-15 16 - 20 Select one: O a. was 15 O b. was 200 O C. was 185 O d. Frequency was 65 120 65 14 Refer to Exhibit 2-3. The number of workers who took at most 10 sick days per month 1
2. Review Ethan's work below. What mistakes did Ethan make? Sample Student Work: Ethan 3x=y 4x ty = 70 3x+y=0 4x+y=20 7x + 2y = 70 x=53 7+5 = 35 351-2y = 70 2y = 35 X=6 = 17-5- must be a whole number 7x6 = 42 42+2y = 70 2y = 28 y = 14
Each accountant at a large accounting firm was classified according to accountant level (junior or senior) and method of transportation to work (walk, bus, drive alone, or carpool). The responses of the 320 accountants at the firm are summarized in the table. Junior Senior Total Walk 25 3 28 Bus 87 12 99 Drive alone 96 25 121 Carpool 52 20 72 Total 260 60 320 What proportion of the accountants at the firm are at the senior level and carpool to work? 20 (A) 60 20 (B) 72 (C) 20 320 112 (D) 320 132 (E) 320
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Maya has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Maya has recorded the travel times for samples of eleven trips via the 10 Freeway and eleven trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-two trips. Travel times in minutes 10 Freeway 74, 72, 75, 75, 74, 72, 67, 67, 75, 69, 71 60 Freeway 70, 80, 69, 71, 69, 77, 68, 79, 74, 79, 77 Send data to calculator Send data to Excel Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.05 level of significance, that u,, the mean travel time via the 10 freeway, is different from µ,, the mean travel time via the 60 freeway? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal…
The chart below shows the numbers of endangered and threatened species both in the United States and abroad. Endangered Threatened United States Foreign United States Foreign Mammals 65 251 8 20 Birds 86 170 19 9 Reptiles 20 65 25 14 Amphibians 15 8 8 1 P(mammal or threatened foreign species)=
Table: Given a group of students at a local college who have been cross-classified as being a senior or not and a business major or not: Business Major Yes No Senior Yes 24 68 No 17 81 5) Using the table from the previous problem,What is P(Business major | Senior) (Round your answer to three decimal places)
A study has been done to determine to see if the level of education determines how often people move between different states in America. Find P(High School Diploma OR lived in 1 state). Lived in Lived in Total Just 1 State 2 or more States No High School Diploma 2 High School Diploma 14 16 30 College Degree 18 20 Total 22 36 58
Jasmine’s current grades in Algebra I are the following. Jasmine’s grades: Grading System: Tests: 56, 72, 76, and 88 Quizzes: 66, 80, 71, 94 Assignments: 75% Final Exam: 86% Tests: 40% Quizzes: 25% Assignments: 10% Final Exam: 25% a. What is Jasmine’s current grade in the class? b. If she scores 10 points higher on the final exam, what would her new average be in the class?
The level of water usage of 250 houses was rated in a survey as low, medium or high and the size of the houses as small, standard or large. The variables,level of water usage and size of house, as recorded in this survey, are a. both numerical variables. b. both categorical variables. c. neither numerical nor categorical variables. d. numerical and categorical variables respectively.
Amy has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Amy has recorded the travel times for samples of eight trips via the 10 Freeway and eight trips via the 60 Freeway. The following table gives the travel times (in minutes) for the sixteen trips: Travel times in minutes 10 Freeway 73, 69, 72, 71, 73, 73, 72, 73 60 Freeway 80, 75, 68, 72, 73, 81, 67, 75 Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.1 level of significance, that the mean travel times of the two routes are different? Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list…
complaint and, if so, whether the complaint was medical or nonmedical in nature. After a year, a tally from these patients was collected to count number who left the HMO voluntarily. Here are the data on the total number in each group and the number who voluntarily left the HMO: No complaint Medical complaint Nonmedical complaint Total A certain health maintenance organization (HMO) wishes to study why patients leave the HMO. A SRS of 423 patients was taken. Data was collected on whether a patient had filed a 177 111 135 Left 64 27 50 If the null hypothesis is Ho : pı = P2 = P3 and using a = 0.05, then do the following: (a) Find the expected number of people with no complaint who leave the HMO: (b) Find the expected number of people with a medical complaint who leave the HMO: (c) Find the expected number of people with a nonmedical complaint who leave the HMO: (d) Find the test statistic: (e) Find the degrees of freedom: (f) Find the critical value: (g) The final conclusion is OA. We…