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
Makovka662 [10]
3 years ago
10

In a statistics course, a linear regression equation was computed to predict the final exam score from score on the midterm exam

. The equation of the least squares regression line was
Y = 10 + 0.9x

Where y represents the final exam score and x is the midterm exam score. Suppose Joe score a 90 on the midterm exam.

What would be the predicted value of his score on the final exam?

a. 81
b. 89
c. 91
d. cannot be determined from the information given. We also need to know the correlation.
Mathematics
2 answers:
prohojiy [21]3 years ago
6 0

Answer:

The correct option would be 'c. 91'

Step-by-step explanation:

Given equation that shows the predicted final exam score,

y = 10 + 0.9x

Where,

x =  midterm exam score,

If midterm exam score is 90,

i.e. x = 90,

Then the predicted value of his score on the final exam is,

y = 10 + 0.9(90) = 10 + 81 = 91

Hence, OPTION C is correct.

Bingel [31]3 years ago
4 0

Answer: c. 91

Step-by-step explanation:

Given : A linear regression equation was computed to predict the final exam score from score on the midterm exam.

The equation of the least squares regression line was

Y = 10 + 0.9x

, where y= the final exam score

x= the midterm exam score.

if Joe score a 90 on the midterm exam, the put x= 90 in the above eqaution , we get

Y = 10 + 0.9(90)

\Rightarrow\ Y = 10 + 81=91

Hence, the predicted value of his score on the final exam would be 91.

Therefore , the correct answer is c. 91 .

You might be interested in
Herman already has 1 sticker, and he will get 33 additional stickers from each sticker pack he buys.
adell [148]

Answer:

Herman needs to buy 3 sticker packs to have a total of 100 stickers.

Explanation:

33 x 3 = 99

99 + 1 = 100

4 0
3 years ago
Please help again with the following 2 questions
yuradex [85]
Perimeter top one:
5+1+2+3+3+4= 18in

Perimeter bottom one:
6+1+4+3+2+4= 20in


3 0
3 years ago
If arc AB = 107° and arc BC = 122°, find the value of x.
Aneli [31]

Answer:

the value of x is acb 133°

4 0
2 years ago
Solve for x <br> triangle abc is similar to triangle aed
3241004551 [841]

Answer:

9/5 or 1.8

Step-by-step explanation:

triangle aed is larger than triangle abc by a scale factor of 5; we know this because side ed is 5 units and cb, the corresponding side in triangle abc, is 1. if ad has a length of 9, the length of ab must be 9 divided by five. thus, z is equal to 9/5 or 1.8.

6 0
3 years ago
A bus went halfway from a village to a city at a certain speed. Then it stopped in traffic for an hour. In order to catch up the
k0ka [10]
We have to assume that the speed before being stuck was sufficient to get to the destination on time had there been no delay. Call that speed "s" in km/h.

Since 200 km is "halfway", the total distance must be 400 km.

time = distance / speed
total time = (time for first half) + (delay) + (time for second half)

400/s = 200/s + 1 + 200/(s+10) . . . .times are in hours, distances in km
200/s = 1 + 200/(s+10) . . . . . . . . . . subtract 200/s
200(s+10) = s(s+10) +200s . . . . . . .multiply by s(s+10)
0 = s² +10s - 2000 . . . . . . . . . . . . . .subtract the left side
(s+50)(s-40) = 0
Solutions are s = -50, s = 40

The speed of the bus before the traffic holdup was 40 km/h.
4 0
3 years ago
Other questions:
  • Bryson is laying down sod in his yard to grow a new lawn .Each peice of sod is a 1-foot by 1-foot square .How many prices of sod
    15·1 answer
  • Need help with numbers 5-12
    7·1 answer
  • What is the Surface area of a cylinder with a radius of 5in and height of 4in
    11·1 answer
  • This recipe makes three portions of soup.
    7·1 answer
  • Write in ordinary form<br> 8.14 x 10-8
    12·1 answer
  • A raised flowerbed is 25 feet long 6 feet wide and 1.8 feet deep. Find the area of the bed and the volume the soil holds
    12·1 answer
  • If one measurement of a golden rectangle is 5.7 inches, what is the other measurement?
    6·2 answers
  • Please help<br> solve (2x+1)(3x+2)=12
    13·1 answer
  • Solve the following: a) 3x2+ 4 9.5 b) 7+2x 5
    15·1 answer
  • A number is greater than 8 The same number of possible solutions to the inequality
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!