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Andrej [43]
3 years ago
7

A baseball team calls itself "America's Favorite Team," because it has 90,000 fans on social media out of 2,210,000 social media

users. Find the population proportion, as well as the mean and standard deviation of the sampling distribution for samples of size n
Mathematics
1 answer:
svetoff [14.1K]3 years ago
6 0

Answer:

Population proportion: 0.04

Sampling distribution mean: 0.04n

Sampling distibution standard deviation: 0.196√n

Step-by-step explanation:

The population proportion can be calculated dividing the total number of fans for this team by the total population of fnas in social media:

\pi=\dfrac{X}{N}=\dfrac{90,000}{2,210,000}\approx0.04

If we take samples of size n, the mean (or expected value) can be calculated as:

\mu_s=\pi\cdot n=0.04n

The standard deviation for the sampling distribution becomes:

\sigma_s=\sqrt{n\pi(1-\pi)}=\sqrt{n(0.04\cdot 0.96)}=0.196\sqrt{n}

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Is the function even, odd or neither?<br> y=x^2-2x-8
mestny [16]

It is neither.

To be even, f(x) must equal f(-x).

If you substitute -x for x, you'd get

     y = (-x)^2 - 2(-x) -8

     y = x^2 +2x -8

This is not the same as the original, so this is not even.

To be odd, f(x) must equal -f(-x).

If you take the -x substitution from the last step and then multiply it by -1, you'd have:

      y = -1 (x^2 +2x -8)

      y = -x^2 -2x +8

This is not the same as the original either.

The function is neither even nor odd.

5 0
3 years ago
Read 2 more answers
Connected to the question before this
lesya [120]

Answer:

(4)Angle A is 63°

Step-by-step explanation:

To find angle A here is what you have to do

(1) triangle A is an Isosceles triangle which has two of its angles being equal.

(2) To find A we hv to look for the interior angles of the triangle. If u look carefully there is this angle outside the triangle .we can use a property called "Angles on a straight line

(3) " Angles on a straight line sum up to 180°" When u do that ur equation will look like this

126+(x)=180°. u may be wondering hw did we get the x?? well i named the angle we dont know with any valuable like T,F etc .when u group like terms ur equation should look like this (x)=180°-126°

if u subtract ur answer should be x=63°

(B) if u look closely u will see there are two triangles. The one to the far right is an Isosceles triangle why because there is this double stroke indicating it is an Isosceles triangle. Remember an Isosceles triangle has its bases being equal. so the the triangle has two angles of 30°. so If we want to find B we first have to find the interior angles of the Isosceles triangle . so our epuarion will be like this 30°+30°+(X)=180°

U group like terms so it will look like this x=180°-60° so,

x= 120°

So now T=120°

Now to find B

we write the equation like this T+(W)=180°

we put the value of T into the Equation w=180°-120 the answer is 60°

So to find B we find the interior angles of the triangle and the interior angles of the Isosceles triangle sum up to 180. so it will look like this B+90+60=180

Nb they should be in Degrees

finally u group like terms. ur equation should look like this B=180-150

ur answer should be B=30°

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4 years ago
Brenda and Lynne cut shapes from
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Answer:

8

Step-by-step explanation:

32/4

8 0
3 years ago
How do I round 30.745 to the nearest hundredth
ruslelena [56]

Answer:


Step-by-step explanation:

What is 15.41 rounded to the nearest hundredth?

Rounding to the Nearest Hundredth. Rounding decimals is very similar to rounding other numbers. If the thousandths place of a decimal is four or less, it is dropped and the hundredths place does not change. For example, rounding 0.843 to the nearest hundredth would give 0.84.

4 0
3 years ago
Mr.Robinson ordered 4 cheeseburgers for $2.95 each and 4 sodas for $1.59 each. If he paid with a $20 bill, how much change did h
Fynjy0 [20]
4 x 2.95 = 11.80$
4 x 1.59 = 6.36$
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20 - 18.16 = 1.84

Mr. Robinson will get $1.84 in change
5 0
3 years ago
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