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maks197457 [2]
3 years ago
13

What is 913 divided by 31

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
8 0
There is something called a calculator
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In the journal Knowledge Quest (January/February 2002), education professors at the University of Southern California investigat
Greeley [361]

Answer:

a,b) x represents the general attitude of these students toward recreational reading.

c) The 10th percentile of sample means is 102.51.

d) P(x < 100) = 0.01390

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by

Z = \frac{X - \mu}{\sigma}

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

In this case, we have that:

The mean score for this population of children was 106 points, with a standard deviation of 16.4 points, so \mu = 106, \sigma = 16.4.

a,b) What is x?

x represent the mean recreational reading attitude score for the sample. So x represents the general attitude of these students toward recreational reading.

c) What sample mean would be the cutoff for the bottom 10% of sample means. (You are being asked for the 10th percentile of sample means.)

This is the value of X when Z has a pvalue of 0.10.

Looking at the Z table, that is Z = -1.28.

We are working with the mean of the sample, so we have to find the standard deviation of the sample. That is

s = \frac{\sigma}{\sqrt{n}} = \frac{16.4}{\sqrt{36}} = 2.73

Z = \frac{X - \mu}{\sigma}

-1.28 = \frac{X - 106}{2.73}

X - 106 = -1.28*2.73

X = 102.51

The 10th percentile of sample means is 102.51.

d) Find P(x < 100).

This is the pvalue of Z when X = 100.

Z = \frac{X - \mu}{\sigma}

Z = \frac{100 - 106}{2.73}

Z = -2.20

Z = -2.20 has a pvalue of 0.01390.

So P(x < 100) = 0.01390.

6 0
3 years ago
I need 4 more tryna go to sleep rn :/
GenaCL600 [577]

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

It is y=2x+2  because you should use m=\frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }  then just plug it in using

(1, 4) and (-2, -2).

\frac{4--2}{1--2} =\frac{6}{3} =2

That eliminates everything except the second one and the third.

So now we would find the b in the equation y=mx+b

y=mx+b\\4=2(1)+b\\4=2+b\\2=b\\b=2

and that's all

5 0
2 years ago
Please help!! I do not understand this!
jarptica [38.1K]

Answer: C

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

Replace x with -\frac{2}{3} and solve.

f(x) = 3x² - 6x - 1

f(-\frac{2}{3}) = 3(-\frac{2}{3})² - 6(-\frac{2}{3}) - 1

    = 3(\frac{4}{9}) + 4 - 1

    = \frac{4}{3} + 3

    = \frac{4}{3} + \frac{9}{3}

    = \frac{13}{3}

     

8 0
2 years ago
12. A grocery store collects donated canned
AveGali [126]

Answer:

For the last three years, the National Post has greeted the yuletide season by publishing the video above. With a simple message of maximizing charitable giving by donating money to the food bank instead of canned goods, it is one of our most popular videos of all time, reaching virtually every corner of the English-speaking world.

Step-by-step explanation:

6 0
2 years ago
The polynomial 24x3 − 54x2 + 44x − 99 is factored by grouping.
Snezhnost [94]
The answer should be
24x3+44x-54x2-99
4 0
3 years ago
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