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maksim [4K]
3 years ago
11

I donot understand at all

Mathematics
1 answer:
loris [4]3 years ago
8 0

Answer:

sorry i dont understand either!!!

Step-by-step explanation:

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Your teacher will report the mean and standard deviation of the sampling distribution created by the class.
sukhopar [10]

Answer:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

Step-by-step explanation:

Assuming the data on the figure attached. We ar assuming that this is a sampling distribution of sample proportions of heads in 40 flips of a coin.

As we can see we have the following values:

0.25, 0.35, 0.375,0.375, 0.40,0.40,0.40, 0.425,0.425,0.425, 0.45,0.45,0.45,0.45, 0.475,0.475,0.475, 0.475,0.475, 0.50,0.50,0.50, 0.525,0.525,0.525,0.525, 0.55,0.55,0.55,0.55,0.55, 0.575,0.575,0.575 0.575, 0.575, 0.60,0.60, 0.65,0.65

And we can calculate the sample proportion with the following formula:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

4 0
3 years ago
The ratio of passenger cars to cargo cars in
KonstantinChe [14]

44 cars

hope it helps....!!!

5 0
2 years ago
Given radius of 24 and central angle of 300 what is the length of the arc, round to two decimal places
VikaD [51]

Hello from MrBillDoesMath!

Answer:

5.24



Discussion:

Circumference of circle = 2 Pi r

Circumference for 300  angle slice

=  (300/360) ( 2 Pi r)

=  (600/360) Pi

=  (15/9) Pi

=  5.24           (calculator:  5.2359877559829887307710723... )



Thank you,

MrB


7 0
3 years ago
What is 7.8 as a fraction?
Inessa05 [86]
7 & 8/10 or 78/10 ( which is the same thing)
5 0
3 years ago
Which is a measure of the efficiency of an investment? A. return rate B. return on investment C. efficiency coefficient
Katen [24]

Answer:

\bold{Return \ Of \ Investment}

Step-by-step explanation:

Return Of Investment: <u><em>The performance used to evaluate the efficiency of an investment or compare the efficiency of a number of different investments. </em></u>

<u><em></em></u>

       It is a performance level used to compare the efficiency of one investment or more to several or just one more investments. They also evaluate the efficiency of one investment.

Return Of Investment (ROI) is very popular because it is simple, skilled and resourceful. If an investments ROI is net is positive, this tells them that it is worthwhile and has some use to it. If it is low, it lets people know that this is probably not the best solutions, and to not waste their time on something that won't work anyway.

\boxed{\bold{Mordancy}}

6 0
4 years ago
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