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masha68 [24]
3 years ago
5

If a sample of 77 students were taken from a population of 950 students, o^2 could refer to the variance of how many of the stud

ents height
Mathematics
2 answers:
MAVERICK [17]3 years ago
4 0
<span>variance of </span>950 students
mixas84 [53]3 years ago
4 0

Answer with explanation:

Sample of Students Chosen =950----N

Total Number of students = 77

Probability of choosing a student from 77 students, that is Probability of Success

             =\frac{77}{950}------P

Probability of Failure ,that is choosing a student from , 950-77=873, students

        =\frac{873}{950}-----Q

\text{Variance}(\sigma)^2=\sqrt{NPQ}\\\\=\sqrt{950 \times \frac{77}{950}\times \frac{873}{950}}\\\\=\sqrt{873 \times \frac{77}{950}}\\\\=70.7589

Approximately ,70 or 71 Students refer to the variance of of the students height.

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Read 2 more answers
WILL GIVE BRAINLIEST THANKS AND 5 STARS FOR CORRECT ANSWER Desmond ran a lemonade stand in front of his house for the fans walki
Fiesta28 [93]

Answer:

56

Step-by-step explanation:

First, convert the 70% so that we can use it with the 80 cups. To do this, convert the percent to a decimal by moving the decimal 2 spaces to the left:

70% → 70.00 → 0.70 → 0.7

70% percent can be seen as 0.7. Multiply this by 80:

80*0.7=56

So, 70% of 80 is 56. Desmond sold 56 cups on the second Saturday.

:Done

7 0
3 years ago
The profitability, P, of a popular restaurant franchise can be modeled by the function P (t) = t4 – 10t3 + 28t2 – 24t, where t i
vekshin1

In this question, the profit of the restaurant after t months is given by a polynomial function. To find when it begins to show a profit, we find the numerical values of the function for t, and it shows a profit when t > 0

Profit after t months:

P(t) = t^4 - 10t^3 + 28t^2 - 24t

0 months:

This is P(0). So

P(0) = 0^4 - 10*0^3 + 28*0^2 - 24*0 = 0

1 month:

This is P(1). So

P(1) = 1^4 - 10*1^3 + 28*1^2 - 24*1 = -5

2 months:

This is P(2). So

P(2) = 2^4 - 10*2^3 + 28*2^2 - 24*2 = 0

3 months:

This is P(3). So

P(3) = 3^4 - 10*3^3 + 28*3^2 - 24*3 = -9

4 months:

This is P(4). So

P(4) = 4^4 - 10*4^3 + 28*4^2 - 24*4 = -32

5 months:

This is P(5). So

P(5) = 5^4 - 10*5^3 + 28*5^2 - 24*5 = -45

6 months:

This is P(6). So

P(6) = 6^4 - 10*6^3 + 28*6^2 - 24*6 = 0

7 months:

This is `P(7). So

P(7) = 7^4 - 10*7^3 + 28*7^2 - 24*7 = 175

After 7 months it shows profit, so it starts showing profit on the 6th month, and thus, the correct answer is given by option D.

For another example of a function involving numeric value, you can check brainly.com/question/24231879

8 0
3 years ago
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