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SSSSS [86.1K]
2 years ago
15

How Many Close Confidants Do People Have? In a recent study,1 2006 randomly selected US adults (age 18 or older) were asked to g

ive the number of people in the last six months with whom you discussed matters that are important to you. The average number of close confidants was 2.2, with a standard deviation of 1.4. Hampton, K.,. Goulet, L., Rainie, L., and Purcell, K, "Social Networking Sites and Our Lives.' Pew Research Center.
(a) Find the margin of error for this estimate if we want 99% Round your answer to three decimal place
Mathematics
1 answer:
yaroslaw [1]2 years ago
7 0

Answer:

0.08065

Step-by-step explanation:

Given that in a recent study,1 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months with whom you discussed matters that are important to you.

If X is random variable then X has mean 2.2 and s = 1.4

n=2006

Std error of mean =\frac{1.4}{\sqrt{2006} } \\=0.03126

For 99% since sample size is large, t and z distn almost coincide.

Hence we can take 2.58 as critical value

Margin of error at 99% =2.58*0.03126\\=0.08065

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What is two and two fourths plus one third
kkurt [141]

Answer:

2 5/6

Step-by-step explanation:

2 2/4 + 1/3

First, you have to make the bottoms of the fraction the same, by figuring out the lowest common denominator. In this case it would be 12. 4x3 = 12. 3x4 = 12.

Multiply the top number by the same number you multiplied the bottom by.

We multiplied the 4 by 3, so we would also multiply the 2 by 3 (which would be 6).

Do the same for the second fraction. 1x4 = 4.

Now we have 2 6/12 + 4/12. We add the top numbers together and we get 10/12.

Now we have to reduce the fractions. We can do this in this situation by just dividing the top and bottom numbers by 2.

2 5/6

8 0
3 years ago
Helia invested 4000 AED for 3 years with a compound interest rate of 1.5%, Calculate the worth of her investment at the end of t
sineoko [7]

Answer:

4180 AED

Step-by-step explanation:

Given data

Principal= 4000

Time= 3 years

Rate= 1.5%

The compound interest expression is given as

A= P(1+r)^t

substitute

A=4000(1+0.015)^3

A= 4000(1.015)^3

A= 4000*1.045

A= 4180

Hence the worth will be  4180 AED

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3 years ago
The square root of 9x plus 7 plus the square rot of 2x equall to 7
Oliga [24]
Move all terms to the left side and set equal to zero. Then set each factor equal to zero.
x=2
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3 years ago
Help, No links please!!!!!!
jolli1 [7]

Answer:

I think 60 because say u do 2×3 you get 6 but do 20×3 and it's 60 so I think it's 60 so sorry if I'm wrong.

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3 years ago
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Write an equation showing that reggie received 30 points.
andreev551 [17]

Answer: 19 questions wrong, 16 questions right

Step-by-step explanation:

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