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Zigmanuir [339]
3 years ago
8

Help please !/!/!/!/!/!/!/!/

Mathematics
2 answers:
Ivenika [448]3 years ago
5 0
Hold on I’m gonna do it
kirill [66]3 years ago
4 0

Answer: 40

Step-by-step expla

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How do you think statistics may at times not say something? How can a well-designed study be used to carefully say everything th
Anon25 [30]

Answer:

While statistics are extremely valuable, they are also notorious for being a means that people use to make false and misleading arguments. Also far too often statistics are obtained by taking a sample from a larger group and assuming the whole group has the same characteristics as the sample.

A sample provides a smaller set of the population for review, that delivers data that is useful to represent the whole population. Surveying a smaller sample, as opposed to the entire population, can save precious time for researchers and offer urgent data.

Step-by-step explanation:

Hope it is helpful.....

7 0
3 years ago
The distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 a
Licemer1 [7]

Answer:

P(\bar X >70)= P(Z>\frac{70-69}{\frac{4}{\sqrt{36}}})= P(Z>1.5)

And for this case we can use the complement rule and the normal standard distribution of excel and we got:

P(Z>1.5)=1-P(Z,1.5) = 1-0.933=0.0668

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(69,4)  

Where \mu=69 and \sigma=4

And we select a sample size of n =70

From the central limit theorem  (n>30)we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we want to find this probability:

P(\bar X >70)

And we can use the z score formula given by:

z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And using this formula we got:

P(\bar X >70)= P(Z>\frac{70-69}{\frac{4}{\sqrt{36}}})= P(Z>1.5)

And for this case we can use the complement rule and the normal standard distribution of excel and we got:

P(Z>1.5)=1-P(Z,1.5) = 1-0.933=0.0668

6 0
4 years ago
What is a reciprocal?
prohojiy [21]
<span>a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.
</span>
7 0
4 years ago
Read 2 more answers
Solve using substitution please<br><br> y=-3x - 10<br> y = 6x + 8
Kamila [148]
6x+8=-3x-10
9x=-18
x=-2
-3(-2)-10=-4
So x=-2 and y=-4
5 0
4 years ago
Read 2 more answers
It takes a word processor 22 minutes to word process and spell check 8 pages. Find how long it takes her to word process and spe
OlgaM077 [116]

Answer:

99 minutes

<em>Brainliest, please!</em>

Step-by-step explanation:

22/8 = x/36

11/4 = x/36

36(11)/4 = x

396/4 = x

x = 99

7 0
3 years ago
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