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
Sunny_sXe [5.5K]
2 years ago
10

Find the expected value of the winnings

Mathematics
2 answers:
Oksana_A [137]2 years ago
7 0

The correct answer is 3.1!!

Bas_tet [7]2 years ago
6 0

Answer:

2.65

Step-by-step explanation:

Multiply each payout by its probability, then add those products.

See the attached image.

The first column has the payouts.  The second column has the probabilities. The third column has the results of multiplying a payout by its probability.

The sum of the entries in the third column is 2.65

You might be interested in
Julie, the soccer team's captain, wants to borrow her parents' car to drive to the tournament. Her parents tell her that she has
Anna71 [15]
G=d2/(divide)26... I think
5 0
3 years ago
The average test scores in a physics class is normally distributed with a standard deviation of 5.4. 50 scores with a sample mea
andrey2020 [161]

Answer:

to my knowledge

this question is gigantic

6 0
2 years ago
Aiden reads a few books of his book on on day one.
const2013 [10]

Answer:

ok

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
___H2 + ___Br2 → ___HBr
Vaselesa [24]

Answer:H2+Br2-->2HBr

Step-by-step explanation:

The amount of atoms on the left side must be equal to the amount of atoms on the right side for each element.

On the left you got 2xH and 2xBr.

This means you must have the same amount on the right.

2HBr =2xH + 2xBr

3 0
3 years ago
Assume you have noted the following prices for books and the number of pages that each book contains. Book Pages (x) Price (y) A
belka [17]

Answer:

a) y=0.00991 x +1.042  

b) r^2 = 0.7503^2 = 0.563

c) r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

Step-by-step explanation:

Data given

x: 500, 700, 750, 590 , 540, 650, 480

y: 7.00, 7.50 , 9.00, 6.5, 7.50 , 7.0, 4.50

Part a

We want to create a linear model like this :

y = mx +b

Wehre

m=\frac{S_{xy}}{S_{xx}}  

And:  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}  

With these we can find the sums:  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=2595100-\frac{4210^2}{7}=63085.714  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=30095-\frac{4210*49}{7}=625  

And the slope would be:  

m=\frac{625}{63085.714}=0.00991  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{4210}{7}=601.429  

\bar y= \frac{\sum y_i}{n}=\frac{49}{7}=7  

And we can find the intercept using this:  

b=\bar y -m \bar x=7-(0.00991*601.429)=1.042  

And the line would be:

y=0.00991 x +1.042  

Part b

The correlation coefficient is given by:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

For our case we have this:

n=7 \sum x = 4210, \sum y = 49, \sum xy = 30095, \sum x^2 =2595100, \sum y^2 =354  

r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

The determination coefficient is given by:

r^2 = 0.7503^2 = 0.563

Part c

r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

4 0
3 years ago
Other questions:
  • Logbase3 (x+2)= log base3 (2x^2-1) steps 1 through 6
    11·1 answer
  • If x/2 + 3y=6, then solve for x in terms of y and y in terms of x
    14·1 answer
  • A football thrown by a quarterback follows a path given by hx=-0.0095x2+x+7, where h is the height of the ball in feet and x is
    11·1 answer
  • Into a bucket, 3.705 liters of water flowed in 7.8 minutes. Enter the number of liters that flowed into the bucket each minute a
    12·1 answer
  • What are the coordinates of a point that is 6 units from (2,5)​
    5·1 answer
  • Two buses leave towns 339 miles apart at the same time and travel toward each other. One bus travels 13 mi/h slower than the oth
    15·1 answer
  • Plz, help me plz!!!!!!<br> Which triangles are congruent?<br> Image below
    7·2 answers
  • Find the mean and median of following data 17, 10,3,5 and 15
    5·1 answer
  • Which expression is equivalent to 5 (h + 9)? <br>45 h 14 h 5 h + 9 5 h + 45
    14·2 answers
  • 6 more than three times a number
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!