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Musya8 [376]
4 years ago
14

If the population standard deviation is o=10, how large a sample is necessary to have a standard error that is less than 5 point

s?
Mathematics
1 answer:
Karo-lina-s [1.5K]4 years ago
7 0
Use the following questions & solve for n to find the sample size: sample error = o / sqrt(n). Next you would arrange equation to solve for sample size: sqrt(n) = o / sample error. Then square both sides to get: n = (o / sample error)^2.
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Is 6.48 a rational number
Flauer [41]

Answer:

Yes

Step-by-step explanation:

it can be written as a fraction

4 0
4 years ago
2) Find xif y =18<br> Y = 6x - 24
masha68 [24]
Y=6x-24

substitute 18 for y
18=6x-24

add 24 on both sides
42=6x

divide both sides by 6
7=x
6 0
3 years ago
Read 2 more answers
Find two supplementary angles such that the smaller is 30 degrees more than one-half the larger
almond37 [142]
Answer: 100° and 80°
==================================
working:

supplementary angles = angle + angle = 180°

let the larger angle be x
smaller angle = (x/2) + 30

x + ((x/2) + 30) = 180°
(2x + x + 60) / 2 = 180°
3x + 60 = 360°
3x = 300°
x = 100°

Therefore the larger angle is 100°

smaller angle
= (100° / 2) + 30°
= 80°

Therefore, the two supplementary angles are 100° and 80°
6 0
3 years ago
The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes)
SCORPION-xisa [38]

Answer:

The credit remaining on a phone card (in dollars) is a linear function of the

total calling time made with the card (in minutes), as shown in the figure below.

The remaining credit after 45 minutes of calls is $22.80 , and the remaining

credit after 64 minutes of calls is $19.76.

Step-by-step explanation:

What is the remaining credit after 73 minutes of calls?

;

Not sure what figure you are referring to, write an equation from the given values:

Assign the values as follows

x1 = 45; y1 = 22.80

x2 = 64; y2 = 19.76

:

Find the slope (m) using the formula: m = %28y2-y1%29%2F%28x2-x1%29

m = %2819.76-22.80%29%2F%2864-45%29 = %28-3.04%29%2F%2819%29

m = -.16

:

7 0
3 years ago
Evaluate these questions 27(1/3)2
LenaWriter [7]

Answer:

18

Step-by-step explanation:

1/3 of 27 is 9. 9 times 2 is 18.

7 0
3 years ago
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