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charle [14.2K]
3 years ago
9

PLEASEE I NEED YOUR HELP.

Mathematics
1 answer:
zloy xaker [14]3 years ago
3 0

Answer:

<h2>8 units² </h2><h2>PLS, BRANLIEST :) I NEED 1 MORE!</h2><h2 /><h2>(i mean i helped you so pls help me!)</h2><h2 />
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Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immedia
Hatshy [7]

This question is incomplete, the complete question is;

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, was -0.61.

what is the correct value of the coefficient of determination R² and give a correct interpretation of its meaning

Answer:

Interpretation of coefficient of determination R² = 0.3721

R² = 0.3721, meaning 37.21% of the total variation in test scores can be explained by the least square regression line

Step-by-step explanation:  

Given the data in the question;

the least square regression line is;

y"  = -1.5x + 85

the correlation coefficient r = -0.61

Now, the coefficient of determination R² is square of correlation coefficient r

R² = -61²

R² = 0.3721

8 0
3 years ago
6. Jay has a rope that is 31 ft long. He
SCORPION-xisa [38]

Answer:

No, he does not have enough rope. 0.26 ft short.

Step-by-step explanation:

3 x 10.42 = 31.26

31.26 - 31 = 0.26

3 0
3 years ago
How many nickels are there in seventeen dollars?
Hunter-Best [27]
20 nickels = 1 dollar

So, do 20 x 17.

20 x 17 = 340 nickels which is $17.

The answer is 340 nickels!
4 0
3 years ago
a school bus traveled at an average speed of 35 miles per hour for 45 minutes . what distance did the school bus travel
rodikova [14]
45/60=0.75. Speed*time=distance. 35(0.75)= 26.25 miles
5 0
3 years ago
Read 2 more answers
A is directly proportional to B and when A = 4 , B = 8 8. Find A when B = 44 .​ please can I have the working out
musickatia [10]

Answer:

A = 2

Step-by-step explanation:

If A = 4 when B = 88, we can divide both A and B by 2 to find their values.

88/2 = 44

4/2= 2

We can also check this by dividing 88 by 4 to figure out that A = 1 when B = 22

We can then multiply both the values of A and B to get a proportional relationship of A = 2, B = 44

(sorry if this is confusing but I hope it helped)

5 0
3 years ago
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