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Bumek [7]
3 years ago
9

Pollsters often use randomly selected digits between 0 and 9 to generate parts of telephone numbers to be called. What is the di

stribution of such randomly selected​ digits? If a pollster repeats the process of randomly generating 50 digits and finding the​ mean, what is the distribution of the resulting sample​ means?
Mathematics
1 answer:
omeli [17]3 years ago
4 0

Answer:

1.The distribution of the random digits is uniform

2.The distribution of the resulting sample are approximately normal

Step-by-step explanation:

1.Based on the information given Pollsters use randomly selected digits between 0 and 9 often in order to generate parts of telephone numbers to be called which means that the distribution of the randomly digits which was selected will be uniform reason been that there is an equal probability of selecting any of the numbers between 0 and 9.

2.The distribution of the resulting sample mean would be approximately normal reason been that the sample size is greater than 30.

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lana66690 [7]

Answer:

  • 5 ÷ 96

Step-by-step explanation:

<u>The scale is </u>

  • 15 in ÷ 24 feet =
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6 0
3 years ago
Is the answer a, b, c, or d.
ale4655 [162]
The correct answer is d.

We have the following system of linear equations:

(I) 4x+7y=-14
(II) 8x+5y=8

Let's use the elimination method, then let's multiply the equation (1) \times(-2) and subtracting (I) and (II):

(I) -2(4x+7y)=-2(-14)
∴ -8x-14y=28

(I) -8x-14y=28
(II) 8x+5y=8
____________________
(III)  -9y=36

∴  y=-4

We can find the value of x by substituting y either in (I) or (II). Thus, from (I):

4x+7(-4)=-14
∴ 4x-28=-14
∴ 4x=14
∴ x=\frac{14}{4}
∴ \boxed{x=\frac{7}{2}}

Let's substitute the values of x and y into (I) and (2)

(I) 4(\frac{7}{2})+7(-4)=14-28=-14
(II) 8(\frac{7}{2})+5(-4)=28-20=8

Finally the answer is:

\boxed{x=\frac{7}{2} \rightarrow x= 3 \frac{1}{2}}

4 0
2 years ago
It's just reflections please help​
Vadim26 [7]

Answer:

C. P'(-4,-7), Q'(-8,-7), R'(-3,3).

Step-by-step explanation:

When a shape is reflected over a line y=x, the values in the coordinates are just swapped.

P(-7,-4) becomes P'(-4,-7)

Q(-7,-8) becomes Q'(-8,-7)

R(3,-3) becomes R'(-3,3)

The answer is P'(-4,-7), Q'(-8,-7), R'(-3,3).

6 0
2 years ago
Please please please please please help me please ​
Lesechka [4]

Answer:

a

Step-by-step explanation:

im guessing on this,  but im positive this is the right answer

7 0
3 years ago
Answer ill mark the brainliest please help
kenny6666 [7]

Answer:

8

Step-by-step explanation:

3x8 = 24

24 divided by 2 is 12

2/3 of 12 is 8

3 0
3 years ago
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