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agasfer [191]
2 years ago
13

!! WILL MARK BRAINLIEST PLZ HELP !!

Mathematics
1 answer:
Luba_88 [7]2 years ago
5 0

Answer:

c

Step-by-step explanation:

.................................

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What is obtained by squaring the standard deviation?
anastassius [24]
<h2>Answer:</h2>

Variance

<h2>Step-by-step explanation:</h2>

The standard deviation is related to the variance. The standard deviation measures the variation or dispersion of a set of data and is represented by the Greek letter sigma \sigma, while the variance measures how far a set of  numbers are spread out from their average value. The variance is obtained by squaring the standard deviation, so the variance can be found as \sigma^{2}

3 0
3 years ago
Why is it important to consider scale when graphing inequalities?
Olegator [25]

Because to get a straight line you need a scale. Otherwise you will not be able to graph a straight line.

6 0
3 years ago
In a recent poll, 35% of survey respondents said that, if they only had one child, they would prefer the child to be a boy. Supp
Schach [20]

Answer:

we have that z = 1.8326 which is not close to z factor of 0. The result is not within limits.

Step-by-step explanation:

Following normal approximation to binomial we have

mean = n×p

standard deviation = √(n×p×(1-p))

n is equal to 160

p is equal to 35%

n×p is equal to 150×0.35 = 52.5

this is the probability that you would expect based on the knowledge that 35% of survey respondents said they would prefer a boy than a girl.

in your survey you got 74 out of 150 and you want to know if this is statistically significant or if you can expect this deviation by chance.

standard deviation is calculated as √(n×p× (1-p))which becomes

√ (150×0.35×0.75 = 6.2749 which is more than enough accuracy for what is required.

without a continuity correction, your formula would be:

z (74 > 52.5) = (population mean - sample mean) / population standard deviation which becomes (74-52.5)/6.2749 = 1.8326

this is not close to a z factor of 0 which means that the results are not within limits.

with a continuity correction, your formula would be:

z (52.5 > 52.5) = 0

A z factor of zero means that your sample mean is exactly the population mean.

3 0
3 years ago
What is -9= n/15 - 10​
ladessa [460]

Answer:

left denominator is 15 the right is 10 hope this helps and add me on ig thick_but_lit

Step-by-step explanation:

7 0
3 years ago
3 packeges for $1.29 what is that one package has
ipn [44]
$1.29 divided by three.
$0.43 B
8 0
3 years ago
Read 2 more answers
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