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
Reil [10]
3 years ago
12

Suppose a prediction equation was built on training data yielding:

Mathematics
1 answer:
Radda [10]3 years ago
7 0

Answer:

3.04

Step-by-step explanation:

Given the prediction equation:

y_hat = 145.5 -5.5*x

- - - - x - - - - - - - - - у

1 - - 10.36 - - - - 87.87

2 - - 9.96 - - - - 89.83

3 - - 12.50 - - - - 71.61

1) y_hat = 145.5 -5.5*(10.36)

y_hat = 145.5 - 56.98 = 88.58

2) y_hat = 145.5 -5.5*(9.96)

y_hat = 145.5 - 54.78 = 90.72

3) y_hat = 145.5 -5.5*(12.50)

y_hat = 145.5 - 68.75 = 76.75

Root mean squared error (RMSE) :

Number of observations (n) = 3

√(Σ(y_hat - y)^2) / n

y_hat = predicted value

y = actual value

Σ[(88.58-87.87)^2+(90.72-89.83)^2+(76.75-71.61)]

Σ(0.71^2) + (0.89^2) + (5.14^2)

27.7158 / 3 = 9.2386

√9.2386

= 3.0395065

= 3.04

You might be interested in
A landscaping business is purchasing plants from a nursery to finish a project. It will cost $7 each to buy each tree and $5 eac
wlad13 [49]

Answer:

7x + 5y ≤ 770

Step-by-step explanation:

3 0
3 years ago
Which is the equation of the line?
DIA [1.3K]
The answer is B, the x-axis crosses over to -8 the way the line goes also means it is a negative. I don't know for sure because i haven't done this in a while but I hope it helps.
3 0
3 years ago
Help would be appreciated ( Grade 4 homework )
saul85 [17]

9514 1404 393

Answer:

 (B)  4

Step-by-step explanation:

Consider the units column. The only sum of 3 and a single digit that will end in 1 is the sum ...

  3 + 8 = 11

This tells you A = 8, so the top number is 1983, and the middle number is B78.

Considering the first two columns, we know that 83 +78 = 161, so there must be a carry of 1 into the third column. That makes it have the sum ...

  1 + 9 + B = <something ending in 4>

We know the something cannot be 04 or 24, so must be 14. Then ...

  10 + B = 14   ⇒   B = 4

__

So, the whole sum is ...

  1983 +478 = 2461

and the letter values are ...

  • A = 8
  • B = 4
  • D = 2
3 0
3 years ago
Read 2 more answers
What is the scientific notation 523,120,000
Rus_ich [418]
5.2x10^8 :)))))))))))))
5 0
3 years ago
Read 2 more answers
Find the circumference and area of a circle<br>with a radius of 5 feet.​
iVinArrow [24]

Circumference = 2(pi)r

Area = (pi)r^2

r = 5

5 * 2 = 10

Circumference = 10π

5 * 5 = 25

Area = 25π

Using 3.14 as pi substitute:

5 * 3.14 = 15.7

15.7 * 2 = 31.4

Circumference = 31.4

5 * 5 = 25

25 * 3.14 = 78.5

Area = 78.5

4 0
3 years ago
Other questions:
  • Use the indicated x-values on the graph of y = f(x) to find the following.
    6·1 answer
  • What is the answer to this problem
    15·1 answer
  • I need help on this question please
    7·1 answer
  • An architect designs a rectangular flower garden such that the width is exactly two-thirds of the length. If 340 feet of antique
    8·1 answer
  • A scientist had 3/5 liter of solution. He used 1/6 of the solution for an experiment. How much solution did the scientist use fo
    9·1 answer
  • I forgot what 25 divided by 12 is lol pls help me
    9·1 answer
  • Please help, if explained i’ll give brainlest, please be serious thank you. this is due in 30 minutes.
    9·2 answers
  • 4.
    8·1 answer
  • At a farmers’ market, Karen and Alice each bought some bread that cost $2 per loaf. Then Karen spent $3 to purchase other items,
    10·1 answer
  • A hotel charges a service fee of $1.00 per day to use its copy machine. In addition, there is a charge of $0.10 per copy made. W
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!