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BaLLatris [955]
3 years ago
8

The kingston review (kr) is testing a new gmat question. the kr wants to determine what proportion of test-takers will answer th

e question correctly, in order to assess its difficulty. in a random sample of 144 test-takers, 75% answered the question correctly. what is the 95% confidence interval for the proportion of test-takers answering the question correctly?
Mathematics
1 answer:
oksian1 [2.3K]3 years ago
7 0
[67.9 %, 82.1 %] is the 95% confidence interval for the proportion of test-takers answering the question correctly. So we have [67.9 %, 82.1 %] In a random sample of 144 test-takers with 75% answered the question correctly. So the answer in this question is [67.9 %, 82.1 %].
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When you reflect across the y axis the y coordinate stays the same and the x coorrdinate changes sign  so x = -1 goes to x = 1

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6 0
3 years ago
The length of a rectangle is 4 more than twice the width. The perimeter is 74 feet. Find the length and width of the rectangle.
mafiozo [28]
(2*length)+(2*width)=perimeter
length=4+2w
(2(4+2w))+(2(w))=74
74=(8+4w)+(2w)
74=6w+8
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3 0
3 years ago
PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!!
Taya2010 [7]

Answer:

1071.79 yd³

Step-by-step explanation:

radius r = 16/2 = 8 yd

height = 16 yd

volume = (1/3)×πr²h

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= 1071.79 yd³ (rounded to the nearest tenth)

3 0
3 years ago
Solve for x: −4|x + 5| = −16
Lana71 [14]

Answer:

Step-by-step explanation:

x 1= -9, x 2 = -1. so the third one

8 0
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9 minus 3 divided by 1/3 plus 1 (solve using B.O.D.M.A.S. procedure)
Citrus2011 [14]
9 - 3 ÷ 1/3 + 1
BODMAS says that the first thing we do in this is the division (D), so 3 ÷ 1/3 = 9
9 - 9 + 1
Now we do the addition, 9 + 1 = 10
9 - 10 = -1
So your final answer is -1, I hope this helps!
7 0
3 years ago
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