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
Arturiano [62]
3 years ago
5

The scatter plot shows the time spent watching TV, x, and the time spent doing homework, y, by each of 24 students last week.

Mathematics
1 answer:
evablogger [386]3 years ago
8 0

Answer:

y = - 0.833 + 29.5

y = 17

Step-by-step explanation:

Drawing a best fit line through the data points:

The approximate regression model would have an intercept of about 29.5

The slope = Rise / Run = (y2 - y1) / (x2 - x1)

The slope = (5 - 25) / (27 - 3) = 20 / 24 = -0.8333

The regression equation is thus :

y = mx + c

m = slope ; c = intercept

y = - 0.833 + 29.5

B)

x = 15

y = - 0.833(15) + 29.5

y = -12.5 + 29.5

y = 17

Approximately 17 hours watching TV

You might be interested in
Suppose we have three urns, namely, A B and C. A has 3 black balls and 7 white balls. B has 7 black balls and 13 white balls. C
professor190 [17]

Answer:

a. 11/25

b. 11/25

Step-by-step explanation:

We proceed as follows;

From the question, we have the following information;

Three urns A, B and C contains ( 3 black balls 7 white balls), (7 black balls and 13 white balls) and (12 black balls and 8 white balls) respectively.

Now,

Since events of choosing urn A, B and C are denoted by Ai , i=1, 2, 3

Then , P(A1 + P(A2) +P(A3) =1 ....(1)

And P(A1):P(A2):P(A3) = 1: 2: 2 (given) ....(2)

Let P(A1) = x, then using equation (2)

P(A2) = 2x and P(A3) = 2x

(from the ratio given in the question)

Substituting these values in equation (1), we get

x+ 2x + 2x =1

Or 5x =1

Or x =1/5

So, P(A1) =x =1/5 , ....(3)

P(A2) = 2x= 2/5 and ....(4)

P(A3) = 2x= 2/5 ...(5)

Also urns A, B and C has total balls = 10, 20 , 20 respectively.

Now, if we choose one urn and then pick up 2 balls randomly then;

(a) Probability that the first ball is black

=P(A1)×P(Back ball from urn A) +P(A2)×P(Black ball from urn B) + P(A3)×P(Black ball from urn C)

= (1/5)×(3/10) + (2/5)×(7/20) + (2/5)×(12/20)

= (3/50) + (7/50) + (12/50)

=22/50

=11/25

(b) The Probability that the first ball is black given that the second ball is white is same as the probability that first ball is black (11/25). This is because the event of picking of first ball is independent of the event of picking of second ball.

Although the event picking of the second ball is dependent on the event of picking the first ball.

Hence, probability that the first ball is black given that the second ball is white is 11/25

​​

8 0
3 years ago
Here are 15 cards, numbered 1 through 15. if you pick a card, what is the probability that you choose an odd number or a two?
kondor19780726 [428]
9/15. There are 15 cards and 8 of them are odd and 1 is a 2. 
5 0
3 years ago
A multiplication problem that will give you the answer 24x⁷​
N76 [4]
7x7(12+9) to the power of 3
4 0
3 years ago
An education budget went from $800,000 to $900,000. What is the approximate percent increase?
just olya [345]
The increase would be possibly about by 100,000 dollars, but if you were to take it as a decimal as a millionth, it would go up by 10 percent.
3 0
3 years ago
Read 2 more answers
What is 74 divided by 9??
Rama09 [41]
Its 8.22.. the 2 repeats
3 0
3 years ago
Other questions:
  • What answers go to these questions
    6·1 answer
  • a toy copany want to sell 1.600 toy airplanes this year. so far they have sold 600. what percant of thee sales goal have they re
    11·1 answer
  • Keith bought 3.4 pounds of peanuts on monday,2.5 pounds on tuesday, and 4 pounds on wednesday. he is going to divide them equall
    12·1 answer
  • 28,-(-73),(-65),(95),-(47) least to greatest
    12·2 answers
  • A ranger spots a forest fire on a 24-meter observation tower. The angle of depression from the tower to the fire is 29°. To the
    14·2 answers
  • Write an equation to represent
    6·1 answer
  • A set of exam marks has mean 70 and median 65 marks. It is decided to subtract 10 from all the marks. For the new set of marks,
    15·1 answer
  • A self-serve frozen yogurt shop has 8 candy toppings and 4 fruit toppings to choose from. How many ways are there to top a froze
    9·1 answer
  • Mrs. Douglas packs candy bars into boxes for the members of the school band to sell as a fundraiser. Each candy bar weighs 5.75
    13·2 answers
  • What is the sum of 7 x 10-8 and 2 x 10-8 ?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!