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
tia_tia [17]
3 years ago
8

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Mathematics
2 answers:
ladessa [460]3 years ago
6 0

Answer:

D

Step-by-step explanation:

C is also possible but it is not purely random and it is not mentioned the mall is in her district.

Juli2301 [7.4K]3 years ago
4 0

Answer:  D) Mail a questionnaire to random households.

<u>Step-by-step explanation:</u>

A) You are limited to only listeners of the radio show

B) You are limited to only those that are wiling and able to attend the meeting.

C) You are limited to only shoppers at that particular mall.

D) Randomly selecting households is the least biased method of responses from the district.

You might be interested in
Angel is x years old, in 15 years how old will Angel be?
Verizon [17]

The age would increase by 15 years that is, x+15

8 0
3 years ago
The sum of the residuals should always be 0 because the predicted values should be that close to the actual values.
kow [346]

Answer: True

Step-by-step explanation:

The sum of the residuals is always 0 so the plot will always be centered around the x-axis. An outlier is a value that is well separated from the rest of the data set. An outlier will have a large absolute residual value.

7 0
3 years ago
Read 2 more answers
BRUH what is 14x(8-10)=6
bogdanovich [222]

Answer:

0.18

Step-by-step explanation:

14x(8-10)=6

Distribute 14x

112x-80x=6

32x=6

6/32=0.18

x=0.18

Hope this helps

........and is right :p

6 0
3 years ago
The game of European roulette slots: 18 red, 18 black, and I green. A ball is spun onto the wheel and will eventually land ina s
Anestetic [448]

Answer:

(a) E(x) = -0.081  S.D = 3

(b) E(x) = -0.081  S.D = 1.73

(c) it is less risky to bet $1 in three different rounds as compared to betting $3 in a single round.    

Step-by-step explanation:

(a) You bet $3 on a single round which means that if you win the game, your amount will double ($6), your profit will be $3. Whereas, if you lose the round, your profit will be -$3. You can only bet on red or black and both have 18 slots each.

So, the probability of landing the ball in a red/black slot = 18/37. This is the probability of winning. The probability of losing can be calculated as 1-18/37 = 19/37.

We can make a probability distribution table:

x                    3             -3

P(X=x)         18/37      19/37

Expected value E(x) can be calculated as:

E(x) = ∑ x.P(x)

      = (3)(18/37) + (-3)(19/37)

E(x) = -0.081

Standard deviation can be calculated by the following formula:

Var(x) = E(x²) - E(x)²

S.D = √Var(x)

We need to first calculate E(x²).

E(x²) = ∑x².P(x)

       = (3)²(18/37) + (-3)²(19/37)

       = (9)(18/37) + (9)(19/37)

E(x²) = 9

Var(x) = E(x²) - E(x)²

         = 9 - (-0.081)²

Var(x) = 8.993

S.D = √8.993

S.D = 2.99 ≅ 3

(b) Now, the betting price is $1 and 3 rounds are played. We will compute the expectation for one round and then add it thrice to find the expectation for three rounds. Similarly, for the standard deviations, we will add the individual variances and then consider the square root of it.

E(x) = ∑ x.P(x)

      = (1)(18/37) + (-1)(19/37)

E(x) = -0.027

Standard deviation can be calculated by the following formula:

Var(x) = E(x²) - E(x)²

S.D = √Var(x)

We need to first calculate E(x²).

E(x²) = ∑x².P(x)

       = (1)²(18/37) + (-1)²(19/37)

       = (1)(18/37) + (1)(19/37)

E(x²) = 1

Var(x) = E(x²) - E(x)²

         = 1 - (-0.027)²

Var(x) = 0.9992

The expectation for one round is -0.027

For three rounds,

E(x₁ + x₂ + x₃) = E(x₁) + E(x₂) + E(x₃)

                     = (-0.027) + (-0.027) + (-0.027)

E(x₁ + x₂ + x₃) = -0.081

Similarly, the variance for one round is 0.9992.

Var (x₁ + x₂ + x₃) = Var(x₁) + Var(x₂) + Var(x₃)

                           = 0.9992 + 0.9992 + 0.9992

Var (x₁ + x₂ + x₃) = 2.9976

S.D = √2.9976

S.D = 1.73              

(c) The expected values for both part (a) and (b) are the same but the standard deviation is lower in part (c) as compared to (b). Since the standard deviation is less in part (c), it means that it is <u>less risky to bet $1 in three different rounds as compared to betting $3 in a single round.</u>            

5 0
3 years ago
What is the solution set for 4x + 1 = 13, given the replacement set {1, 2, 3, 4} ?
Svetradugi [14.3K]
B-x=3

Solve for x-
4x+1-1=13-1
4x=12
4x/4=12/4
x=3
7 0
3 years ago
Read 2 more answers
Other questions:
  • the sum of the page on the facing pages of the book is 77. what are the page numbers on the left and right ?
    11·2 answers
  • A pair of dice is rolled, and the number that appears uppermost on each die is observed. Refer to this experiment and find the p
    13·1 answer
  • george has 6 cups of tamato sause he needs 3/4 of the sause to make lasagna wich best describes how much sause will George use
    15·1 answer
  • Find the difference and express the answer in Scientific Notation
    14·1 answer
  • What is the sST for the data set (1, 5), (2, 8), (4, 14)?<br><br> 14<br> 42<br> 25<br> 9
    12·1 answer
  • Please help asap!! Read carefully
    6·1 answer
  • PLS PLS HELP I WILL MARK BRAINLIEST
    12·2 answers
  • Which table of ordered pairs represents a proportional relationship?
    15·1 answer
  • Which expression is equivalent to 880 • (10- 1/2)?
    11·1 answer
  • Yolanda created a scatter plot of the relationship between the number of times she visited different friends each month, y, and
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!