Education reform is one of the most hotly debated subjects on both state and national policymakers’ list of socioeconomic topics. Consider a linear regression model that relates school expenditures and family background to student performance in Massachusetts using 224 school districts. The response variable is the mean score on the MCAS (Massachusetts Comprehensive Assessment System) exam given to 10th graders. Four predictor variables are used: (1) STR is the student-to-teacher ratio in %, (2) TSAL is the average teacher’s salary in $1,000s, (3) INC is the median household income in $1,000s, and (4) SGL is the percentage of single-parent households. A portion of the data is shown in the accompanying table.

Score STR(%) TSAL(in $1000) INC(in $1000) SGL(%)
227.0 19.00 44.01 48.89 4.70
230.67 17.90 40.17 43.91 4.60
. . . . .
. . . . .
230.67 19.20 44.79 47.64 5.10

Required:
a. For each explanatory variable, discuss whether it is likely to have a positive or negative causal effect on Score.
b. Find the sample regression equation. Are the signs of the slope coefficients as expected?
c. What is the predicted score if STR = 18, TSAL = 50, INC = 60, SGL = 5?
d. What is the predicted score if everything else is the same as in part(c) except INC = 80?

Answer:

A:

STR= -

TSAL= +

INC=+

SGL=-

B:

231.89 - .50 - .02 + .29 -.88

B2:

STR=Y

TSAL=N

INC=Y

SGL=Y

C:

234.89

D:

240.69

Step-by-step explanation:

y is inversely proportional to the square of p, can be written as: y = O True O False​

Ashley selected 5 essays from each student in her class. Each student wrote the same number of essays. Is this sample of the essays written by the class likely to be biased?​

The Athens-Clarke Country Wildlife Resource Center wanted to encourage wildlife preservation efforts among students in its summer camp. In the past, it would run a particular curriculum, then gauge students' interest in wildlife preservation in a test at the end of the camp. Historically, the average on this final test to gauge preservation interest was 35.3 (out of 100).

Last summer, the resource Center created a new curriculum focusing on campers interacting directly with wildlife to promote preservation efforts. This included efforts in species dentrication handling of wild animals, and directoration of animals in habitat The Resource Center considers the collection of 40 to be a random samping from the population of campers they will encounter They need your help to determine whether this new curriculum Improves impressions about witte preservation. For their 40 scores at the end of lut summer, they found a sample mean of 26.58 and a standard deviation of 3.18.

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What are the null and alternative trypotheses?

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Find the area of this parallelogram, top= 14 left= 11 right = 10

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C.r=6.30×5
D.r=6.30−5

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A rocket is launched from atop a 74-foot cliff with an initial velocity of 113 ft/s. The height of the rocket above the ground at time t is given by h=16t^2+113t+74. When will the rocket hit the ground after it is launched? Round to the nearest tenth of a second.

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A 24 X 2 - 8 + 42 divided by 8 - 6

B 24 X 2 - 8 + 42 divided by (8 - 6)

C 24 X (2 + 8) + 42 divided by 8 - 6

D 24 X 2 - (8 + 42) divided by 8 - 6

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Select the correct answer.
The function g(x) = x is transformed to obtain function h:
h(x) = g(x) - 5.
Which statement describes how the graph of h is different from the graph of g?
OA. The graph of h is the graph of g vertically shifted down 5 units.
OB.
The graph of h is the graph of g horizontally shifted right 5 units.
OC. The graph of h is the graph of g horizontally shifted left 5 units.
D. The graph of h is the graph of g vertically shifted up 5 units.

2. Write the equation of the circle with a center at
(-2, -8) and a radius of v10.

A. (x + 2)^2 + (y + 8)^2 = 25
B. (x - 2)^2 + (y – 8)^2 = 10
C. (x + 2)^2 + (y + 8)^2 = 10
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E. (x - 2)^2 + (y - 3)^2 = 100

Find the missing angle in the triangle,
x°
36°
111°

I will give you brainliest answer if u help me with 4 problems

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3.The probability of drawing a pearl bead out of a bag of mixed beads is 2/3. What is the probability of drawing a bead which is NOT pearl?

can you please help me out if you know this answer
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Winston earns $140.00 by selling 56 hot dogs at a concession stand at school. Using the
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Show your work.

You have 42 peaches and want to share them equally with 6 people. How many peaches will each person get? Please be sure to write your answer in a complete sentence.

2x° + 14°
60°
X=
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In the figure below, m2 1=(x-12)° and mZ2 =5xº.
Find the angle measures.

Sorry, Here watch this
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Tell whether the statement is true or false.
{ {4, 16, 24, 7, 37} = (37, 16, 7,42,4}​