Percent Who Have Used Country Marijuana Other Drugs Czech Rep. 22 4 Denmark 17 England 40 21 Finland 1 Ireland 37 16 Italy 19 8 No. Ireland 23 14 Norway Portugal 7 3 Scotland 53 31 United States 34 24 ) Create a scatterplot. ) What is the correlation between the percent of teens who have used marijuana and the percent who have used other drugs? -) Write a brief description of the association. d) Do these resulte

Percent Who Have Used Country Marijuana Other Drugs Czech Rep. 22 4 Denmark 17 England 40 21 Finland 1 Ireland 37 16 Italy 19 8 No. Ireland 23 14 Norway Portugal 7 3 Scotland 53 31 United States 34 24 ) Create a scatterplot. ) What is the correlation between the percent of teens who have used marijuana and the percent who have used other drugs? -) Write a brief description of the association. d) Do these resulte

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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11 Find the mode(s) for the following group of data items. 4.3, 6.5, 7.7, 5.4, 6.9, 6.9, 5.9, 7.4, 6.3, 5.2, 5.2 Select the correct choice below and, if necessary, fill in the answer box within your choice. A.The mode(s) is/are ______. ��(Use a comma to separate answers as needed.) B.There is no mode.
10) The following table shows the sample subjects cross-classified by gender and the type of violent victimization reported. Can we conclude on the basis of these data that victimization status and gender are not independent? Let a =0.01. Gender Women Men Total No victimization 611 308 919 Partner 42 20 62 Non-partner 16 17 33 Total 669 345 1014
6. The following table shows the marks of 12 students in Accounts and' Q.T. . Determine the coefficient of correlation. Marks in 65 40 35 75 65 80 35 20 85 65 55 33 ассоuntancy Marks in Q.T 30 55 68 28 76 25 80 85 2035 45 65
When analyzing an association between two variables, the size of the correlation may be deceptive because of a.) a spurious association b.) range restriction c.) conflated data d.) poor statistical validity
22. The arm span and foot length were measured (in Using the computer output, what is the correlation? centimeters) for each of the 19 students in a statistics O 0.630 class and displayed in the scatterplot. An analysis was completed and the computer output is shown. O 0.649 O 0.794 O 0.806 Arm Span vs. Foot Length 29 27 ... 19 155 160 165 170 175 180 185 190 195 Mark this and return Save and Exit Next Submit 65 DELL F3 4101 F4 F5 F6 FZ F8 F9 F10 F11 Priscr F12 Insert %23 %24 & 4. 5 7 08. E R D F G J K L Foot Length (cm) 立

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3. Some sports psychologists believe that an athlete's motivation is related to how many hours they will devote to training in a 2-week period. To see if this is true, a sports trainer measures the motivation (M) and training hours (TH) of a random sample of 8 Olympic-class athletes and obtains the following data: M TH 57 40 74 46 42 38 48 36 75 54 62 42 665 76 550 69 25 a) Is there a significant correlation between M and TH in this sample (a≤.05)? (8 points) b) If another athlete obtained an M score of 70, what would his or her predicted TH score be and what are the 90% bounds to the error of this prediction? (10 points)
.Seven instructors are rated by first and seconf year students on “clarity of presentation” and the results are tabulated. Is there a significant correlation between the ratings of freshmen and sophomores on the clarity of presentation of theseveninstructors? Intructor Freshmen Sophomores 1 44 58 2 39 42 3 36 18 4 35 22 5 33 31 6 29 38 7 22 38
1. A Statistics class reports the following data on Sex and Eye Color for students in the class: Blue Brown Green/Hazel/Other Total 20 Males 8 Females 4 Total a. Compare the overall percent of students who are female to the percent of females with each eye color. 6 16 12 b. Make a side-by-side bar chart to show the distribution of sex for the different colors. c. Does it seem that eye color and sex are independent? Explain.
23. Andrews Middle School has gathered data for their students' transportation to and from school. Method of Transportation Female Male Bus 94 102 Car 38 32 Walk 40 44 What is the frequency of students, in total, who ride a bus to and from school? O The frequency of students who ride the bus cannot be determined using the data in the table. 196 students 94 0.92(100) = 92%of students 102 102 students