Show your complete solutionII. Use an appropriate statistical tool to test the hypothesis. Use the stepwise method of hypothesistesting.1. You have collected the following data on Music Quiz Scores (X) and Math Quiz Scores (Y). Youare interested in studying the relationship between musical ability and mathematical ability.Compute the appropriate correlation coefficient for the data. Describe the relationship between thetwo variables.StudentMusic (X)Math (Y)A1011В139C18171215E1714

Answered: 1. You have collected the following…

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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A real estate company specialising in sales of farms would like to know if their salespeople's sales can be predicted based on the number of years with the company. The years of experience is the explanatory variable and number of sales the predictor. The data below captures this information. Calculate the correlation coefficient (rounded off to two decimals). x 1 2 3 4 5 6 7 8 9 10 A. 0.9473 B. -0.4578 C. 0.8973 OD. -0.9987 y 3 2 5 4 6 8 9 9 12 10 SSxy=85 SSX = 82.50 SSY = 97.60 b = 1.0303 x = 5.5 y=6.8
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?
For the following scores, X Y 0 4 2 9 1 6 1 9 Draw a scatter plot. Is this a positive or negative correlation? Explain what a positive correlation and negative correlation are. Compute the pearson correlation.
Which of the following best describes the Pearson correlation for these data? X Y 2 5 5 1 3 4 4 2
A student of Engineering conducted a research to determine the correlation between performance of 2 lathes in the workshop. Assessments were conducted on weekly basis, and the following data were obtained. Calculate the coefficient of correlation using Karl Pearson's method, and discuss the level of the relationship. Table 2. The performance of the lathes on weekly basis. Week(s) 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th Lathe A 42 48 40 28 46 90 28 56 16 22 Lathe B 56 78 72 24 60 42 36 82 28 34 良

Q14Mariam wants to see how the number of absences for a student in her class affects the student’s final grade. The data obtained from a sample are shown. Absences (x)1012208Grade (y)7055968475 Find the correlation coefficient between number of absences and final grade. Round your answer to three decimal places.
Experimental or Observational: A group of students is interested in knowing if there is a correlation between the amount of sleep kids get and their performance on the SAT. They have 20 kids sleep for 5 hours, 20 kids sleep for 6 hours, 20 kids sleep for 7 hours, and 20 kids sleep for 8 hours. They get their SAT scores and analyze the data. ______________
The data below shows the selling price (in hundred thousands) and the list price (in hundred thousands) of homes sold. Construct a scatterplot, find the value of the linear correlation coefficient r, and P-value using a = 0.05. Is there sufficient evidence to conclude that there is a linear correlation between the two variables? Selling Price (x) List Price (y) H₁: p#0 400 412 Construct a scatterplot. Choose the correct graph below. 301 315 376 387 434 440 459 488 H₁ p > 0 477 480 319 324 352 368 417 434 330 341
Answer
After gathering data about the number of starfish and measuring the pollution in areas of the ocean you find a negative linear correlation between pollution levels and number of starfish. What can you conclude based on this information? a. There is a confounding variable that is affecting both pollution and starfish. b. As pollution rises the number of starfish falls c. That pollution is causing starfish to die, leading to the negative correlation d. That pollution is supporting starfish, leading to the negative correlation
Which of the following correlations indicates the strongest relationship or association and why? r = .10; r = .03; r = -.35; r = -15
The numbers of pass attempts and passing yards for seven professional quarterback for a recent year are listed in the table below. Round all answers to the nearest 1000th. Pass attempts (x) 449 565 528 197 670 351 218 Passing Yards (y) 3265 4018 3669 1141 5177 2362 1737 Calculate the sample correlation coefficient, r. Describe the type of correlation coefficient and interpret the correlation in the context of the data.

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