Midterm Final38.64 60.9439.77 48.6842.05 52.4544.3245.45 36.8946.5948.347.16 43.9648.8651.1451.752.2752.2759.0960.2360.2361.9362.553.454.5555.68 64.7256.8264.251.5164.259.09 57.6451.5153.441.659.66 43.4955.2868.9652.9237.3651.517551.047563.07 43.0266.665.6668.0260.4765.3465.34 77.4546.7955.7567.05 68.4967.05 50.0967.05 55.7543.9667.05 55.7568.75 78.8769.89 61.8969.89 71.7969.89 47.7470.45 63.7771.02 78.8771.02 76.0472.16 65.1972.73 74.1573.86 72.2673.8673.86 60.4773.86 60.9448.6897.1664.7263.375.57 54.3475.5748.6876.777.27 52.4577.27 57.1775.0977.84 81.778.41 86.8980.68 80.7580.68 73.2180.68 64.7280.68 72.7481.82 64.7283.52 96.3284.09 68.0284.09 73.2184.66 64.7286.36 63.7786.36 71.7986.36 65.6687.5 63.7788.64 71.3292.05 89.2593.18 97.7494.8995.45 81.797.26100 ThisIn this question, you will work with grades.csv filedata file has two variables: 1) midterm exam grade in percentage; 2) final exam grade inpercentage. Import the data into R and answer the following questions:(a) Use View() function to take a look at the dataset. Notice that the dataset is orderedaccording to the midterm exam grade. Is it ordered in ascending or descending orderof the midterm exam grade?(b) How many students are in this dataset? In other words, what is the sample size?(c) Compute the correlation between midterm and final exam grades for all students.What is the correlation coefficient? Attach R code.(d) Subset the first 30 students' data and assign this data to an R object called subsetData.Attach R. code.(e) Compute the correlation between midterm and final exam grades for only the stu-dents in subsetData. What is the correlation coefficient? Attach R code.(f) Compare the correlation in part (e) with the correlation in part (c). What one issmaller? Why?

Here we will solve the above example in R software we will enter the data into excel and save it as…

Answered: of the midterm exam grade? (b) How many…

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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use the sample data to construct a scatterplot. Use the first variable for the x-axis. Based on the scatterplot, what do you conclude about a linear correlation? FORECAST AND ACTUAL TEMPERATURES The table lists actual high temperatures and the high temperatures that were previously forecasted for these same days. The table includes data for ten different days near the author’s home. What does the result suggest about the accuracy of five-day predicted high temperatures?
The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…
A newspaper collected information on schools in its circulation area in order to compare their quality. Two Which is a true statement regarding Springside? measures the newspaper collected for each school, O Springside does not affect the correlation. mean class size and mean score on a statewide O Springside weakens the correlation shown in the scatterplot. reading exam, are shown in the scatterplot. One school in the report, Springside Elementary, is labeled in the graph. O Springside strengthens the correlation shown in the scatterplot. O Removing Springside would increase the value of the correlation coefficient. Comparing Schools 90 Springside 70 60 50 40 Save and Exit Next Submit Mark this and return ContentViewers/AssessmentViewer/Activity# ch hp Mean State Test Score
An instructor in a statistics course set a final exami- nation and also required the students to do a data analysis project. For a random sample of 10 students, the scores obtained are shown in the table. Find the sample correlation between the examination and proj- ect scores. Examination 81 62 74 78 93 69 72 83 90 84 Project 76 71 69 76 87 62 80 75 92 79
A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 8 children, measures their height and head circumference, and obtains the data shown in the table. The pediatrician wants to use height to predict head circumference. Compute the linear correlation coefficient between the height and head circumference of a child. Height Head Circumference (inches) (inches) 27.5 25 (Round to three decimal places as needed.) 17.3 17.1 26 25.25 27.25 26.75 25.75 27 25 17.2 17 17.6 17.4 17.2 17.3 Enter your answer in the answer box and then click Check Answer. All parts showing Clear All Check Answer Type here to search TOUG Panasonic CF-54 CDSS-4852 TERMO TOGA O O O O D () Scre Loc PrtSc Num Lock F10 F11 F12 F7 F8 F9 SysRq F5 F6 F3 F4 A 8 F1 F2 Esc & 7 0 8 B 90 5 A2 24 近 %#3
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Does a major league baseball team's record during spring training indicate how the team will play during the regular season? Over a six-year period, the correlation coefficient between a team's winning percentage in spring training and its winning percentage in the regular season is 0.18. Shown are the winning percentages for the 14 American League teams during a season. Team SpringTraining RegularSeason Team SpringTraining RegularSeason Baltimore Orioles 0.415 0.430 Minnesota Twins 0.497 0.548 Boston Red Sox 0.427 0.594 New York Yankees 0.585 0.527 Chicago White Sox 0.418 0.564 Oakland A's 0.694 0.474 Cleveland Indians 0.566 0.497 Seattle Mariners 0.497 0.385 Detroit Tigers 0.566 0.465 Tampa Bay Rays 0.732 0.607 Kansas City Royals 0.534 0.470 Texas Rangers 0.642 0.492 Los Angeles Angels 0.717 0.625 Toronto Blue Jays 0.444 0.539 a. What is the correlation coefficient between the spring training and the regular season winning…
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A researcher is interested in the relationship between age and golf performance. The researcher claims that golf performance improves with age, that is, as one gets older, his or her golf scores decrease. [In golf, a low score represents better performance; a higher score represents worse performance.] The researcher randomly selects a group of eight golfers at the local golf course and records their ages and their most recent golf score. The data that were collected are presented below: Golfer's Name Diego Tiger Bogart Marilyn Jennifer Mitch Bubba Amber Age (years) Variable 1 23 14 38 43 49 36 72 Golf Score Variable 2 92 112 77 84 81 72 79 86 Which of the following are the correct statements of the null and alternate hypotheses, Ho and HA? O Ho: M₁ M₂ and HA: H1 H₂
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