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sveta [45]
4 years ago
14

Suppose that 75% of adult Americans agree that, while downloading music from the Internet and then selling it is piracy and shou

ld be prohibited, downloading for personal use is an innocent act and should not be prohibited.We will take a random sample of 50 American adults and ask them if they agree with the statement. Then the sampling distribution of the sample proportion of people who answer yes to the question is:
a approximately Normal, with unknown mean and standard deviation.
b neither Normal, not Binomial.
c Binomial, with n=50 and p=0.75.
d approximately Normal, with mean 0.75 and standard error 0.0612.
Mathematics
1 answer:
Dmitry_Shevchenko [17]4 years ago
6 0
With random sample of 50 and probability of adult American agrees is 75%, then the sampling distribution of the sample proportion is the Binomial distribution, with n=50 and p=0.75

We use Binomial distribution when the number of observation is fixed, each observation is fixed and each observation represents an outcome of "success" and "failure". In above case, the number of observation is 50 and the outcome of success is 0.75
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F(x)=2x-4. F(x)=2x-4 f-1x=_x+_. Complete the inverse function
natita [175]

Answer:

f^{-1}(x) = \frac{1}{2}(x +4)

Step-by-step explanation:

Given

f(x) = 2x - 4

Required

Determine the inverse function

Start by replacing f(x) with y

y = 2x - 4

Swap the positions of y and x

x = 2y - 4

Make y the subject: <em>Add 4 to both sides</em>

x+4 = 2y - 4+4

x+4 = 2y

Make y the subject: <em>Divide through by 2</em>

<em></em>\frac{1}{2}(x + 4) = y<em></em>

<em></em>y = \frac{1}{2}(x + 4)<em></em>

<em></em>

Replace y with f-1(x)

f^{-1}(x) = \frac{1}{2}(x +4)

3 0
3 years ago
How fast was a plane flying if it traveled 40 kilometers in 30 minutes​
dangina [55]

Answer:

80 km/hr

Step-by-step explanation:

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80km in 60 min

4 0
3 years ago
108 identical books have a mass of 30 kg. Find
Lynna [10]

Answer:

(i) 540kg

(ii) 5.56 (rounded off to 3 significant figures)

Step-by-step explanation:

108  \div 30 = 3.6kg

(i)3.6 \times 150 = 540kg

(ii)3.6 \times x = 20

3.6x = 20

x =  \frac{20}{3.6}

x = 5 \frac{5}{9}

4 0
3 years ago
60 boys at a summer camp were asked to complete a survey about their favorite outdoor activity. 18 boys chose biking and 29 boys
nadezda [96]

━━━━━━━☆☆━━━━━━━

▹ Answer

\frac{29}{47} * 100

▹ Step-by-Step Explanation

29 + 18 = 47 → 29/47

Total boys → 100

29/47 * 100

Hope this helps!

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8 0
3 years ago
-x+y=5
photoshop1234 [79]

Answer:

x=-37/3

y=-22/3

Step-by-step explanation:

-2x+2y=10 (1)

2x-5y=12 (2)

(1)+(2) <=> -3y=22

7 0
3 years ago
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