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xxTIMURxx [149]
3 years ago
11

What is the zscore with a confidence level of 95% when finding the margin of error for the mean of a normally

Mathematics
2 answers:
Inessa [10]3 years ago
3 0

Answer:

Z score with a confidence level of 95% is 1.96

Step-by-step explanation:

The computation of the z score with the confidence level of 95% is shown below:

While determining the margin of error for the normally distributed population from the sample, the z score of the confidence level of 95% is 1.96

The same is to be considered

Therefore the third option is correct

gavmur [86]3 years ago
3 0

Answer:

c) 1.96

Step-by-step explanation:

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I will let you decide what counts as a second step,<em> </em>I'm going to write out all the steps.

starting from original equation

49n+986=-43

49n=-1029

n=-21

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How do you put 0.833 in a fraction​
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833/1000

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3 years ago
$400 interest is earned on a principal of $2,000 at a simple interest rate of 59
Charra [1.4K]

Answer:

6.779 years if the interest rate is in dollars.

Step-by-step explanation:

If its 59 percent, it would be well less than a year.

However, if not, divide 400 by 59.

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3 years ago
Linear equation in slope intercept form that passes through (-12, 14) and (6, -1)
strojnjashka [21]

Answer:

uhhh... why dont you check my work lol

Step-by-step explanation:

y = -15/18x + b

-1 = -15/18 (6) + b

-1 = 5 + b

-6 = b

check your work:

14 = -15/18(-12) - 6

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3 0
3 years ago
In a room shaped like an ellipse, something whispered at 1 focus can be clearly heard at the other focus. The U.S. Capitol Natio
DanielleElmas [232]

Answer:

The listener is approximately 71.414 feet far from the whisperer.

Step-by-step explanation:

We must remember that two fundamental variables for every ellipse are the major semiaxis (a) and the minor semiaxis (b). The major semiaxis equals a half of the length of the whispering gallery, whereas the minor semiaxis equals a half of the width of the whispering gallery. These are:

a = 46\,ft and b = 29\,ft

The distance between both whisperers (d), measured in feet, is two times the distance between center and any of the foci (c), measured in feet, whose valued is obtained by using this Pythagorean identity:

d = 2\cdot c

c = \sqrt{a^{2}-b^{2}}

If a = 46\,ft and b = 29\,ft, then:

c = \sqrt{(46\,ft)^{2}-(29\,ft)^{2}}

c \approx 35.707\,ft

d = 2\cdot (35.707\,ft)

d = 71.414\,ft

The listener is approximately 71.414 feet far from the whisperer.

3 0
3 years ago
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