joanasprinkman2262
24.01.2020 •
Mathematics
Suppose john is a high school statistics teacher who believes that watching many hours of tv leads to lower test scores immediately after giving the most recent test, he surveyed each of the 24 students in his class and asked them how many hours of tv they watched that week. he then matched each student's test grade with his or her survey response. after compiling the data, he used hours of tv watched to predict each student's test score. he found the least-squares regression line to be y = -1.5x + 85. he also calculated that the value of r, the correlation coefficient was -0.61. which of the choices identifies the correct value of the coefficient of determination, r^2 and gives a correct interpretation of its meaning? a) r^2 = 0.3721, meaning 37.21% of the total variation in hours of tv watched can be explained by the least squares regression line b) r^2 = 0.61, meaning 61% of the total variation in hours of tv watched can be explained by the least-squares regression line c) r^2 = 0.3721. meaning 37.21% of the total variation in test scores can be explained by the least squares regression line d) r^2 = 0.781. meaning 78.1% of the total variation in test scores can be explained by the least-squares regression line e) r^2 = 0.61, meaning 61% of the total variation in test scores can be explained by the least-squares regression line.
Solved
Show answers
More tips
- F Family and Home How to Remove Tar Stains: Tips and Recommendations from Experts...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- S Sport How to Do a Jumping Split...
- H Health and Medicine How Did Inna Lose Weight on Dom 2?...
- F Family and Home How to Properly Fold Napkins in a Napkin Holder?...
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- A Auto and Moto Battle for the Relocation of The Cherkizovsky Market: Who Won?...
- C Computers and Internet How Do You Refill Cartridges?...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
Answers on questions: Mathematics
- M Mathematics Write an inequality to describe the region. the solid cylinder that lies on or below the plane z = 9 and on or above the disk in the xy-plane with center the origin...
- M Mathematics Richard baker filed his year 1 individual income tax return on april 15, year 2. on december 31, year 2, he learned that 100 shares of stock that he owned had become...
- M Mathematics Suppose thatthe monthly cost, in dollars, of producing x chairs is c(x) =0.001x3 + 0.07x2 + 19x +700, and currently 25chairs are produced monthly. a.)what isthe current...
- M Mathematics Suppose a baker claims that the average bread height is more than 15cm. several of this customers do not believe him. to persuade his customers that he is right, the...
- M Mathematics A. at what points will the line y = x intersect the unit circle x2 + y2 = 1? answer (1/√2, 1/√2), (−1/√2,−1/√2) b. at what points will the line y = −x intersect the...
- M Mathematics Cost= $170 percent markup =85% what is the selling price a.) $9.63 b.) $37.50 c.) $314.50 d.) $271.98...
- M Mathematics Asap. tim s phone service charges $24.45 plus an additional $0.18 for each text message sent per month. if tim s phone bill was $28.95, which equation could be used...
- M Mathematics The force of gravity is otherwise known as volume speed weight mass...
- M Mathematics The figure below shows the quotient of fraction 5 over 7division signfraction 2 over 7 using a rectangle model....
- M Mathematics Amir drove from jerusalem to the lowest place on earth, the dead sea. his altitude relative to sea level (in meters) as a function of time (in minutes) is graphed. graph...
Ответ:
No he is not correct.
Step-by-step explanation:
Since each baseball has signatures on them and he has 10 of them we have to multiply 10 by 5 and we get 50 not 45.So he had 50 signatures in total therefore is not correct.