Answered: Make a scatterplot b. Describe the…

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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Need help with the last answer in the red box as it is wrong.
Q1, a. define correlation and it's types. b. write the properties of r.
A professor went to a website for rating professors and looked up the quality rating and also the "easiness" of the six full-time professors in one department. The ratings are 1 (lowest quality) to 5 (highest quality) and 1 (hardest) to 5 (easiest). The numbers given are averages for each professor. Assume the trend is linear, find the correlation, and comment on what it means. Calculate the correlation. r = (Round to three decimal places as needed.) Comment on the meaning of the correlation. Choose the correct interpretation below. OA. The professors that have high easiness scores tend to also have low quality scores.. OB. Being "easy" as a professor causes students to regard the professor as having a higher quality. OC. The professors that have high easiness scores tend to also have high quality scores. OD. Being "easy" as a professor causes students to regard the professor as having a lower quality. Quality Easiness D 4.7 3.7 4.7 3.1 4.2 3.5 4.2 2.6 3.9 1.9 3.5 1.8
A real estate company specializing 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 is recorded in the tables below. Calculate the intercept (rounded off to four decimals). 1. 3 2 4 4 6 8 8. 9 12 10 10
do the following a.) construct a scatter plot. b.) determine the direction of the straight line that the data points seem to follow. c.) determine the strength of correlation between the two variables depicted in each scatter plot. 1. x 1 2 3 4 5 6 7 8 y 30 50 55 70 35 40 75 45
What kind of relationship is depicted in the following graph? 7 2 1 0 2 3 a. A positive linear correlation b. A nonlinear correlation c. No correlation Od. A negative linear correlation 6 9 10
Answer the given question with a proper explanation and step-by-step solution. Exercise 2.6 For the data below, plot a scatter diagram with variable Y on the vertical axis and variable X on the horizontal axis. Y 40 33 29 56 81 19 20 X 5 7 9 3 1 11 10 (a) Is the relationship between the variables positive or negative? (b) Do you think that a linear or non-linear line better describes the relationship? а ald question
Answer 21-24 thank you
1. Create a histogram for the data for time spent studying. 2. Create a scatter plot to show the relationship of time spent studying and exams score. 1. Looking at the scatter plot, describe the relationship between the two variables, (identify the direction and magnitude)
Complete the table with data showing the results of the examinations out of 100 taken by 9 students in Statistics class depicting either a positive or negative correlation. Exam 1 (x) Exam 2 (y) 78 86 57 68 76 92 87 66 54 74 61 84 77 75 71 66 88 71 Using the following information above: A. Draw a scatter graph. B. Draw a line of best fit and comment on the correlation. c. Work out the gradient of the line of best fit. please with all explanation
a. Make a scatterplot b. Describe the correlation c. Approximate the rate of change, pick any two points on the line. d. build a model
A researcher explored the relationship between the percent of snow days during the month of January and the percent of students that receive an A on class finals at the same schools. The researcher collects information from 6 schools, shown in the table below. Use the graph below to plot the points and develop a linear relationship between the percent of January snow days and the percent of 'A' final exams. School Number % of Snow Days % of A Finals 1 5 25 2 7 45 3 10 50 4 12 65 5 20 70 6 25 86 Using the linear relationship graphed above, estimate the percent of 'A' finals if there are 2% snow days. Provide your answer below:

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Make a scatterplot b. Describe the correlation c. Approximate the rate of change, pick any two points on the line. d. build a model