1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Shtirlitz [24]
3 years ago
13

A mathematics teacher wanted to see the correlation between test scores and

Mathematics
1 answer:
SpyIntel [72]3 years ago
8 0

Answer:

The homework  grade, to the nearest integer, for a student with a test grade of 68 is 69.

Step-by-step explanation:

The general form of the linear regression equation is:

y=a+bx

Here,

<em>y</em> = dependent variable = test grade

<em>x</em> = independent variable = homework grade

<em>a</em> = intercept

<em>b</em> = slope

Compute the value of <em>a</em> and <em>b</em> as follows:

a=\frac{\sum Y\cdot \sum X^{2}-\sum X\cdot\sum XY}{n\cdot \sum X^{2}-(\sum X)^{2}}\\\\=\frac{(592\times 44909)-(591\times45227)}{(8\times44909)-(591)^{2}}\\\\=-14.316                b=\frac{n\cdot \sum XY-\sum X\cdot\sum Y}{n\cdot \sum X^{2}-(\sum X)^{2}}\\\\=\frac{(8\times 45227)-(591\592)}{(8\times44909)-(591)^{2}}\\\\=1.195

The linear regression equation that represents the set of data is:

y=-14.316+1.195x

Compute the value of <em>x</em> for <em>y</em> = 68 as follows:

y=-14.316+1.195x

68=-14.316+1.195x\\1.195x=68+14.316\\1.195x=82.316\\x=68.884\\x\approx 69

Thus, the homework  grade, to the nearest integer, for a student with a test grade of 68 is 69.

You might be interested in
Identify the range of the function shown in the graph.
creativ13 [48]
B. I believe I just wanna get some points
5 0
3 years ago
Read 2 more answers
Can someone please check if this is correct?
Solnce55 [7]

Answer:

Just two corrections!  See attached image.

Step-by-step explanation:

The product of 8 and b taken <u>from</u> 10 means begin with 10 and subtract 8b from it.

8 times the difference of 10 and b means find 10 - b first, <u>then</u> multiply by 8.

7 0
3 years ago
Find the surface area of the composite figure. Round the answer to the nearest tenth.
Svetllana [295]

Answer:

3+4+5+11= 56

Step-by-step explanation:

3 0
3 years ago
The daily high temperatures in a vacation resort city are approximately Normal, with a mean temperature of 75 degrees Fahrenheit
zzz [600]

Answer:

i think is the last one

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Can somebody help me as soon as possible.
Evgen [1.6K]

Answer:  x= -0.2

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • What is the equation
    5·1 answer
  • What patters always end in a 5 or o?
    9·2 answers
  • After Lydia spends 20% of her savings on car repairs, she has $1500 left. How much was in her saving originally?
    8·1 answer
  • Find 2 consecutive positive even integers such that the product of the 1st and 2nd is 2 less than 5 times the 3rd. Use an algebr
    6·1 answer
  • What is 7% of 7,000?
    10·2 answers
  • Rachel has 30 pounds of a mixture of candy that sells for $1.00/lb. If lollipops sell for $0.95/lb and caramel candies sell for
    13·1 answer
  • Jessica drove 936 miles in 13 hours. At the same rate, how long would it take her to drive 648 miles?
    12·2 answers
  • If You Could Travel Anywhere, Where Would You Go?
    8·2 answers
  • A total of 12,650 voters completed an online survey that asked if they are going to vote for a certain political canidate in an
    5·1 answer
  • Or
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!