Ask question

Ask question

All categories

3 years ago

7

Based on the data from six students, the regression equation relating number of hours of preparation (x) and test score (y) is .

the same data yield and what is the best predicted test score for a student who spent 10 hours preparing for the test?

2 answers:

Liula [17]3 years ago

8 0

Answer:

The predicted test score for a student who spent 10 hours preparing for the test is 78.

Step-by-step explanation:

The regression equation is used to determine the predicted value of the response or dependent variable based on an explanatory or independent variable.

The general form of a regression equation is:

$y=\alpha +\beta x$

Here,

<em>y</em> = dependent variable

<em>x</em> = independent variable

<em>α</em> = intercept

<em>β</em> = slope

The regression equation relating number of hours of preparation (<em>x</em>) and test score (<em>y</em>) is:

$y=67.3+1.07x$

Compute the value of <em>y</em> for <em>x</em> = 10 as follows:

$y=67.3+1.07x$

$=67.3+(1.07\times 10)\\=67.3+10.7\\=78$

Thus, the predicted test score for a student who spent 10 hours preparing for the test is 78.

gizmo_the_mogwai [7]3 years ago

3 0

Answer:

78

Step-by-step explanation:

You might be interested in

To mix the color “autumn purple,” a painter mixes 28 parts of blue to 48 parts of red. What is the ratio of blue to red? Express

kupik [55]

Answer:

blue : red

7 : 12

Step-by-step explanation:

blue : red

28 48

Divide each by 4

28/4 48/4

7 12

blue : red

7 : 12

7 0

3 years ago

Read 2 more answers

Help please I don’t understand

soldi70 [24.7K]

It’s A but i look good

6 0

3 years ago

Read 2 more answers

Solve the system of equations by substitution. 3/8 x + 1/3 y =17/24 and <br> x + 7y = 8

goblinko [34]

$\left \{ {{ \frac{3}{8}x+ \frac{1}{3}y = \frac{17}{14} } \atop {x+7y=8}} \right.$

To solve this system by substitution, first isolate x in the second equation.

$x+7y=8$
$x+7y-7y=8-7y$
$x=8-7y$

Now, plug this expression ( $8-7y$ ) for x in the top equation to solve for y.

$\frac{3}{8} (8-7y)+ \frac{1}{3} y= \frac{17}{14}$
$3- \frac{21}{8} y+ \frac{1}{3} y= \frac{17}{24}$
$72-63y+8y=17$
$72-55y=17$
$-55y=17-72$
$-55y=-55$
$y=1$

Now that you have y, plug it into the second equation and solve for x.

$x+7y=8$
$x+7(1)=8$
$x+7=8$
$x=1$

Last step is to plug your x- and y-values in to both equations to check your work.

$\frac{3}{8} (1)+ \frac{1}{3} y= \frac{17}{24}$

$\frac{3}{8} * \frac{3}{3} = \frac{9}{24} ; \frac{1}{3} * \frac{8}{8} = \frac{8}{24}$

$\frac{9}{24} + \frac{8}{24} = \frac{17}{24}$ <--True

$1+7(1)=8$
$1+7=8$ <--True

Answer:
$x=1 \\ y=1$

5 0

3 years ago

A box contains 9 pounds of sand the entire box of sand will be poured in equal amounts into 6 small bags how many bags of sand w

spayn [35]

Answer: 1 1/2

Step-by-step explanation: So you have 9 pounds and you have to distribute it out between 6 bags, so 9 divided by 6 you get 1 1/2 and so 1 1/2 pounds of sand go into each small bag

5 0

3 years ago

What is the slope of Y=0?

olganol [36]

The slope is 0!! any horizontal line, like y = 1, y = 2, y = any other number, has a slope of 0. because it's a horizontal line, it's flat, so there isn't any incline or decline. just as a note: vertical lines (x = 1, etc.) have an undefined slope.

3 0

3 years ago