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igor_vitrenko [27]
2 years ago
10

Help me with this!!! I will mark Brainliest

Mathematics
1 answer:
Maurinko [17]2 years ago
3 0

Answer:

No

Step-by-step explanation:

VX = 4 spaces

UW = 3 spaces

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Suppose we have a population whose proportion of items with the desired attribute is p = 0:5. (a) If a sample of size 200 is tak
crimeas [40]

Answer:

a. If a sample of size 200 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 41.26%.

b. If a sample of size 100 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 30.5%.

Step-by-step explanation:

This problem should be solved with a binomial distribution sample, but as the size of the sample is large, it can be approximated to a normal distribution.

The parameters for the normal distribution will be

\mu=p=0.5\\\\\sigma=\sqrt{p(1-p)/n} =\sqrt{0.5*0.5/200}= 0.0353

We can calculate the z values for x1=0.47 and x2=0.51:

z_1=\frac{x_1-\mu}{\sigma}=\frac{0.47-0.5}{0.0353}=-0.85\\\\z_2=\frac{x_2-\mu}{\sigma}=\frac{0.51-0.5}{0.0353}=0.28

We can now calculate the probabilities:

P(0.47

If a sample of size 200 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 41.26%.

b) If the sample size change, the standard deviation of the normal distribution changes:

\mu=p=0.5\\\\\sigma=\sqrt{p(1-p)/n} =\sqrt{0.5*0.5/100}= 0.05

We can calculate the z values for x1=0.47 and x2=0.51:

z_1=\frac{x_1-\mu}{\sigma}=\frac{0.47-0.5}{0.05}=-0.6\\\\z_2=\frac{x_2-\mu}{\sigma}=\frac{0.51-0.5}{0.05}=0.2

We can now calculate the probabilities:

P(0.47

If a sample of size 100 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 30.5%.

8 0
2 years ago
B) The perimeter of the shape is 25.71 cm
natita [175]

Answer:

r=4cm

Step-by-step explanation:

Having the radius to be involved, the shape is a circle.

<u>Circumference formula </u>

c=2\pi r

Finding radius, formula will be reversed.

r=\frac{25.72cm}{2\pi }

r=\frac{25.71cm}{2(3.142)}            r=\frac{25.71cm}{6.284}          r=4.09cm

4 0
3 years ago
Ariel's guitar teacher charged $35 each month for lessons. Her new rate is $40 a month.
Aleks04 [339]

Answer:

$20

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
1.The radii of two circles are in the ratio of 3 to 1. Find the area of the smaller circle if the area of the larger circle is 2
zmey [24]

It’s 9. 3x9 is 27. Nothing else times anything equals 27, excluding decimals.

8 0
3 years ago
Read 2 more answers
PLEASE HELP ME PLEASE
Licemer1 [7]

Answer:

x

Step-by-step explanation:

f(x) = (x-1)/3

g(x) = 3x+1

f(x) °g(x) =

Substitute g(x) in for x in the function f(x)

f(x) °g(x) = (g(x) -1)/3

             = (3x+1 -1)/3

             = 3x /3

             =x

8 0
3 years ago
Read 2 more answers
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