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OlgaM077 [116]
4 years ago
9

Use the probability model above to determine the successful outcome’s contribution to the expected value of the return.

Mathematics
1 answer:
Keith_Richards [23]4 years ago
8 0

Answer: Hence, Option 'D' is correct.

Step-by-step explanation:

Since we have given that

Probability of successful outcome = 0.7

Probability of unsuccessful outcome = 0.3

Amount he get for successful outcome = $900

Amount he lost for unsuccessful outcome = -$1800

We need to find the expected value of return when there is successful outcome:

P(Success)× Amount for successful

0.7\times \$900\\\\=\$630

Hence, Option 'D' is correct.

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A school has 3400 students. They conduct a random sample of 124 students and find that 38 of them hate the school.
Contact [7]

Answer:

a) We need a sample size of at least 2401.

b) We need a sample size of at least 1936.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

In which

z is the zscore that has a pvalue of .

The margin of error is:

95% confidence level

So , z is the value of Z that has a pvalue of , so .

(a) you are unwilling to predict the proportion value at your school and​

We use , which is when we are going to need the largest sample size.

So we need to find We need a sample size of at least 2401.

(b) you use the results from the surveyed school as a guideline.

Now the same calculation, just with . So

We need a sample size of at least 1936.

5 0
3 years ago
the number is 57733 contains two sets digets in witch one digets is ten times as great as the other what r the values of each di
enyata [817]
7,3
there is two 7s and 3s that is adjacent to each other
8 0
3 years ago
Find the mean, mode and median of 3, 4, 5, 4, 6, 4, 7.
Luda [366]
Mode = is the number with the highest frequency so the answer is 4.
Mean = the average so the answer is 3+4+5+4+6+4+7=33 so 33/7=4.7 (rounded to the nearest one decimal).
Median = the middle number, so the answer is 4.
5 0
2 years ago
What equation is equivalent to x^4-12x^2+36
vredina [299]
Simply solve the square.

(X^2-6)^2
7 0
4 years ago
Write an equation for the line perpendicular to 2x−3y = 5 and containing (−2, 1).
Nostrana [21]

 

Hello:<span>
the equation is : y = ax+b
the slope is a : a×(2/3) = -1......( perpendicular to a line : 2x-3y =7 with a slope of 2/3 because : y = (2/3)x-7/3)
a = -3/2         y=(-3/2)x+b
the line that passes through (-2, 1) : 1 = (-3/2)(-2)+b
b = -2
<span> the equation is :  y  = (-3/2)x-2</span></span>

8 0
3 years ago
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