MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
expand_more
expand_more
format_list_bulleted
Related questions
Question
Transcribed Image Text:Here are two sets of bivariate data with the same response variable. The first contains the variables
x & y. The second contains the variables w & y
| y
w
y
25.3 43.9
68.8
36.7
43.8
56.7
57
55
49.2
61.3
27.9
52
57.4
69.3
48 | 50.5
33.7 47.3
58.3 49.2
46.3
56
46.6 34.4
67.1
75.8
35.1
48.3
25.7
43.4
19
76.8
47.2
57.9
7.3 56.8
37.5
57.4
32.9
56.2
44.8
60.4
43.8
49
29.7
38.5
26.4 | 60.9
42.8
53.6
55.6
49.4
60.3
69.7
53.9
55
53.2
67.1
47.8 42.7
57.4
66.3
25
54.8
45.5
57.6
13.9
65
42
51.6
69.5
43.6
38.9
54.8
79.5
29
Transcribed Image Text:What is the r value of the strongest relationship? Round to four decimal places.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by stepSolved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- Find the dependent and independent variable in this excersice and solve it in spss.arrow_forwardBelow are four bivariate data sets and their scatter plots. (Note that all of the scatter plots are displayed with the same scale.) Each data set is made up of sample values drawn from a population. х у 1.0 | 1.0 2.0 2.0 u v 1.0 3.8 11 T 11– 10 10- 2.0 6.1 9. 8 3.0 3.0 4.0 | 4.0 3.0 7.0 7+ 7+ 4.0 4.5 6+ 5+ 5+ 5.0 5.0 5.0 5.0 4 6.0 | 6.0 6.0 8.2 + + + + + + 7.0 |7.0 7.0 5.7 8.0 | 8.0 8.0 6.5 10 i 10 11 9.0 9.0 9.0 8.7 |10.0 10.0 Figure 1 10.0 7.4 Figure 2 w t 1.0 8.1 m 11- 10+ 9- 11- 1.0 4.4 10- x X x x 2.0 6.6 2.0 6.2 9- 8+ X 8. | 3.0 7.9 3.0 8.2 4.0 5.6 6+ 4.0 9.4 6- 5+ 5.0 7.5 5.0 9.7 4 4 - 6.0 4.5 6.0 9.5 3 2 7.0 5.0 7.0 9.5 2- 8.0 3.7 8.0 8.3 10 i 10 11 9.0 4.4 9.0 6.0 |10.0 2.8 Figure 3 10.0 4.2 Figure 4 Answer the following questions. The same response may be the correct answer for more than one question. (a) In which data set is there evidence of a strong nonlinear relationship between the two variables? (Choose one) the x, y data set (b) the u, v data set the w, t data set…arrow_forwardDoes a statistics course improve a student's mathematics skills,as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher tha scores before. Take the differences - before - after. Before After 430 465 485 475 520 535 360 410 440 425 500 505 425 450 470 480 515 520 430 430 450 460 495 500 540 530 What type of alternative hypothesis is appropriate for this research question? O two-sided • one-sided Locate student9 in the dataset. What rank will be given to this student? 3 What is the value of the test statistic, T? Give answer to 1 decimal place. -1.9 1x What is the critical value for the study? (Hint: student 10 vill be dropped from the analysis, since the scores are the same before and after the stats class). 2.7 Are the exam scores significantly higher…arrow_forward
- MY NG The college physical education department offered an advanced first aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z-scores for some of the students are shown below. Robert 1.08 Juan 1.88 Haley -1.94 Joel 0.00 Jan - 0.96 Linda 1.76 (a) Which of these students scored above the mean? (Select all that apply.) O Robert V Juan O Haley O Joel O lan A Linda (b) Which of these students scored on the mean? (Select all that apply.) O Robert O Juan O Haley O Joel O Jan O Linda P Type here to search 12:46 PM 78°F AQI 52 7/30/2021 %2:arrow_forwardA statistics professor would like to build a model relating student scores on the first test to the scores on the second test. The test scores from a random sample of 21 students who have previously taken the course are given in the table. Student Test Grade 1 Test Grade 21 42 812 51 743 88 624 99 575 54 726 66 737 87 638 99 579 97 5810 89 6311 42 7712 71 6313 96 5514 56 7615 75 6916 57 7017 62 7518 89 6319 50 7220 56 7221 89 57Step 1 of 2 : Using statistical software, estimate the parameters of the modelSecond Test Grade=β0+β1(First Test Grade)+εi.Enter a negative estimate as a negative number in the regression model. Round your answers to 4 decimal places, if necessary.arrow_forwardTanner recently moved into a new neighborhood and was surprised by the large amount of trick ortreaters he received. He asked his neighbors and found out that in previous years they averaged about40 trick ortreaters each Halloween Tanner thinks this year there were a lot more. Below is the data that each house got this year:House 1 49House 2 48House 3 35House 4 53House 5 40 What statistical test should we use to test hypothesis? (Z-Test, One-Sample T-Test, Dependent Two-Sample, or Independent Two-Sample) Why?arrow_forward
- Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are given. Complete parts (a) through (c) below. 44 43 32 17 32 43 38 15 58 46 54. 14 (a) Find the mean and median of the data. The mean is 27 34 41 53 31 23 GRAPE (Round to three decimal places as needed.) 48 31 35 28 33 25 28 53 34 28 16 37 19arrow_forwardCigarette smoking and cancer have been linked. The number of bladder cancer deaths (in deaths per 100 thousand) and cigarette sales (in cigarettes sold/person) for 36 randomly selected countries are in the table below. X, cigarette sales Y, the number of bladder cancer deaths 14 3.31 20.94 3.64 25.91 5.21 28.64 5.98 25.82 3.52 25.89 4.63 42.4 6.54 33.6 4.78 27.91 4.75 18.2 2.9 22.86 4.78 28.27 4.46 28.04 3.2 20.08 2.94 29.14 5.3 19.96 2.89 23.32 3.72 24.96 5.27 26.38 4.47 21.16 2.9 21.58 4.65 29.18 4.99 21.84 2.91 22.12 4.23 30.34 3.46 40.46 5.6 21.25 5.14 23.44 2.86 16.08 3.06 22.06 3.72 23.44 2.93 20.1 3.08 26.18 4.09 28.92 4.79 23.78 4.89 18.24 2.99 a) State the random variables. rv X = of rv Y = of b) The symbol and value of the correlation coefficient are as follows: Round final answer to 3 decimal places. = Interpret this value: There…arrow_forwardThe Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.arrow_forward
- Based on the following two tables, what conclusions can you draw? Contrast between the expected values and the observed values. H1: The gender and afraid to walk at night in your neighborhood are not independent variables. H0: The gender and afraid to walk at night in your neighborhood are independent variables.arrow_forwardResearchers want to know if a tutoring program affects students’ ACT scores. They used a sample of twenty students and tested them before and after the tutoring program. Use Excel to perform a dependent sample t-test to determine whether the difference between the mean pretest score and the mean posttest score is significantly different. Assume unequal variance. Subject Pretest Posttest 1 21 25 2 30 33 3 25 26 4 28 31 5 31 34 6 16 16 7 19 21 8 21 24 9 26 27 10 34 34 11 22 23 12 18 24 13 14 17 14 19 23 15 24 25 16 33 30 17 25 27 18 26 26 19 22 24 20 19 18arrow_forward3. Can SAT scores predict college performance? Let x be a variable that represents SAT score of a computer science major, and let y be a variable that represents a student’s GPA upon graduation. A random sample of n =15 computer science majors provided their SAT scores and GPAs: x 1232 1070 1086 1287 1130 1048 1121 1095 1135 1208 1333 1160 1186 1243 1261 y 3.52 2.91 2.4 3.47 3.47 2.37 2.4 2.24 3.02 3.32 3.59 2.54 3.19 3.71 3.58 The scatter diagram for the SAT score and GPA is given below: (a) Find the sample correlation coefficient r. Truncate to two decimal places. What does the value tell you about the data? (b) Find the equation of the least squares line . Truncate to four decimal places. What does the slope mean? (c) Find the value of the coefficient of determination . Truncate to two decimal places. What does this number mean? (d) What is the predicted GPA if a computer science major got a…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning 
Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman