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SSSSS [86.1K]
3 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]3 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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allsm [11]
Put them in order from smallest to largest
110, 125, 138 , 144, 152,153,162, 163,164, 174, 174, 175, 177,180,183,185, 186,187, 194,195, 196,198

median = (174 + 175 )/2 = 174.5

answer
174.5


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3 years ago
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So, the additive inverse of -7/8 is​
zlopas [31]

Answer:

Im prett sure its 7/8

Step-by-step explanation:

The additive inverse of a number is a number that, when added, goes to zero. For example, 7 is -7 because when added it equals 0 (or 7-7)

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3 years ago
Which value is equivalent to 48 ÷ ((2 + 6) × 2) − 1?
nalin [4]

Answer:

1

Step-by-step explanation:

use PEMDAS=

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3 years ago
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Find the volume of this cone. <br><br> Round to the nearest tenth. <br><br> 10ft<br><br> 6ft
alexira [117]

Step-by-step explanation:

If radius = 6ft and height = 10 ft

volume of cone= (1/3)*pi*r^2*h

= (1*22*6*6*10)/3*7

(1*22*2*6*10)/7

3960/7

565.714

570ft

<h2><u>MARK ME AS BRAINLIST</u></h2>
3 0
2 years ago
A cube has a side length of 12 m what is the volume of the cube?
AfilCa [17]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ volume = length x width x height

volume = 12 x 12 x 12

volume = 1728

The volume is 1728 cm^3

<h3><u>✽</u></h3>

➶ Hope This Helps You!

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3 years ago
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