The following table shows students’ test scores on the first two tests in an introductory statistics class. Statistics Test Scores First test, x 63 89 65 74 74 48 41 84 40 62 44 59 Second test, y 70 91 71 67 80 61 47 85 31 62 41 61 Step 1 of 2 : Find an equation of the least-squares regression line. Round your answer to three decimal places, if necessary

The following table shows students’ test scores on the first two tests in an introductory statistics class. Statistics Test Scores First test, x 63 89 65 74 74 48 41 84 40 62 44 59 Second test, y 70 91 71 67 80 61 47 85 31 62 41 61 Step 1 of 2 : Find an equation of the least-squares regression line. Round your answer to three decimal places, if necessary

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 Z The following table lists the birth weights (in pounds), x, and the lengths (in inches), y, for a set of newborn bables at a local hospital. Answer S + H Copy Data Step 1 of 2: Find an equation of the least-squares regression line. Round your answer to three decimal places, if necessary. 3 e C $ 4 Birth Weight (in Pounds), x f Length (in Inches), y ŷ = 5 t g Birth Weights and Lengths 6 11 5 3 9 12 11 11 4 10 b 16 18 15 15 20 20 19 20 16 21 6 h hp & 7 U 8 N 9 k O O P Tables Key Subr
Report the equation of the regression line and interpret it in the context of the problem
I need the right answer to d, e, and f ASAP, please.
Consider the following. x 1 2 3 4 y 4 6 9 13 (a) Find an equation of the least-squares line for the data. (Give each answer correct to 3 decimal places.)y = x +(b) Draw a scatter diagram for the data and graph the least-squares line.
The following gives the number of accidents that occurred on Florida State Highway 101 during the last 4 months: N Video Get more help - # 3 Using the least-squares regression method, the trend equation for forecasting is (round your responses to two decimal places): ŷ=0+0x 30 A E D $ 4 R F % 5 T Month Jan Number of Accidents 25 G MacBook Air Y H U Feb 48 8 Mar 64 1 9 Apr 90 K O Clear all P
The total number of views a certain video has on a social media website is recorded every day for five days. The results are recorded in the table below. Day 0 1 2 3 4 5 Total Views 2018 4575 14,724 39,019 93,130 317,352 a) Determine an exponential regression of the form y = ab using the least-squares method to fit this data, where y is the total number of views the video has on day x. Round each value to four decimal places. b) Using the regression from a), how many views will the video have at the end of day 7 ? Round to the nearest whole number.
You ask a small sample of 6 students what percentage score they obtained in a recent exam and how many hours they spent preparing for the exam. The data you obtained is summarised in the table below. Time spent studying (hours) 12 9 23 Answer: 7 13 11 Exam score (out of 100) 70 56 91 60 52 58 You fit a least squares line to the data which can be used to predict exam scores from the time spent studying. You find that the intercept of the line is equal to 37.691, and the slope is 2.145. Calculate the t-statistic used to the test the null hypothesis that the true population slope is zero. (Round the result to three decimal places.)
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n order for applicants to work for the foreign-service department, they must take a test in the language of the country where they plan to work. The data below shows the relationship between the number of years that applicants have studied a particular language and the grades they received on the proficiency exam. Find the equation of the regression line for the data. given Number of years, x 4 5 3 6 2 7 3 Grades on test, y 61 68 75 82 73 90 58 93 72 O A. y 6.910x+46.261 O B. -46.261x +6.910 O C. =6.910x-46.261 O D. = 46.261x-6.910 Next Time Remaining: 01:02:25 74°F Mostly 五 TTL