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
densk [106]
3 years ago
7

Help me and you get 100 points and Brainliest

Mathematics
2 answers:
OlgaM077 [116]3 years ago
8 0

hey someone else has already answered this!

a. To find the least squares regression equation for a group of (x,y) points:

Step 1: For each point(x,y), we need to calculate x² and xy first.

Step 2: Sum all x, y, x² and xy, which gives us Σx, Σy, Σx² and Σxy

Step 3: Calculate Slope m: m = (NΣxy − Σx Σy)/ N(Σx²) − (Σx)² , here N is the number of data.

Step 4: Calculate Intercept b: b = Σy − m(Σx)/ N

Step 5: Assemble the equation as y= mx+b

Here, we have ∑x = 120, ∑y= 1379, ∑x²= 919.5, ∑xy= 10466 and N= 16

So, m= (NΣxy − Σx Σy)/ N(Σx²) − (Σx)²

=

=

=  

= 6.33

and b = Σy − m(Σx)/ N

=

=

=

= 38.71

So, the least squares regression equation is : y= mx+b ⇒ y= 6.33x +38.71

b. When x= 8, then y= (6.33×8)+38.71 = 50.64 + 38.71 =89.35

The approximate test score of a student who sleeps an average of 8 h a night is 89.35%

EVERYTHING IS FROM sicista on brainly!

GrogVix [38]3 years ago
8 0

Answer

Yep, that guy answered it

Step-by-step explanation:

give me or him brainliest, but mostly the other guy

and go ahead and thank sicista

You might be interested in
Please Help me with this question will mark as Brainllest
Aleks [24]

Answer:

it is 72

Step-by-step explanation:

8 0
3 years ago
A buoy is 8 km N 60° E of a boat as shown. How far east of<br> the boat is the buoy?
Bumek [7]

Answer:13.86km

Step-by-step explanation: see attachment

6 0
3 years ago
Ruth Behr has ¾ liters of soda in her refrigerator. She poured 1/8 liter of soda in multiple cups. Enter the number of cups Ruth
Serga [27]

Answer:

6

Step-by-step explanation:

3/4*8=6

3 0
3 years ago
Carpet Company A
Ann [662]

Answer:

2.45

Step-by-step explanation:

7 0
2 years ago
What is the estimate for 243?
Tatiana [17]

Answer:

200

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • The difference between two positive integers is 4. If the smaller is added to the square of the larger, the sum is 68. Find the
    10·1 answer
  • Is it possible for 0 and a positive number to have a common multiple?
    11·2 answers
  • You can show your work if u want to<br> Find 2 numbers if Their sum is −7 and their difference is 14
    7·1 answer
  • What is 0.5 as a percent?
    15·2 answers
  • Help ASAP please!!!!!
    5·1 answer
  • Need help real quick haha pls<br><br> Numbers as answers only, no variables pls. thank u! :)
    14·1 answer
  • Find the Central arc measure
    9·1 answer
  • ANSWER ASAP IM BEING TIMED
    6·1 answer
  • B) Calcula el tiempo en minutos de un nadador que batio el récord mundial de las
    10·1 answer
  • Use Pythagorean theorem to find right triangle side le
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!