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Given a population of class sizes at a university in an academic year, indicate what the sampling distribution for samples of 3

drek231 [11]

Answer:

D

Step-by-step explanation:

sampling distribution is statistical representation of statistics of each sample. So for a class size of 30,

A. number of samples have to be very large and defined in sampling distribtuion so this option is nullified

B. sample collection in sampling distribution is done without replacement of individuals so this option is nullified

C. this explanation doesn't match with the definition so this option is nullified

D. It is the correct option

3 0

3 years ago

5x + 2y = 7 y = x + 1 What is the solution set of the given system? {(5/7, 12/7)} {(12/7, 5/7)} {(9/7, 16/7)} {(16/7, 9/7)}

Rama09 [41]

5x+2y=7

y=x+1

5x+2(x+1) =7

5x +2x+2=7

7x +2 =7

7x = 5

x = 5/7

y=5/7 +1

y =12/7

(5/7, 12/7)

5 0

3 years ago

The interval time, I, in minutes, between appointments is related to total number of minutes T that a doctor spends with patie

zmey [24]

Answer:

Approximately 5.19 hours.

Step-by-step explanation:

The question is asking that you solve for T (the amount of time spent with patients in a day). To do so, simply input the values which it has given you for your variables. We can substitute 16 for I as that is the doctor's preferred interval time and we can substitute 21 for N as that is the amount of appointments the doctors wishes to have per day.

$16=1.08(\frac{T}{21} )$

To solve, start by multiplying both sides by 21.

$336=1.08T$

Next, divide both sides by 1.08.

$311.11=T$

Your answer comes out to 311.11 minutes. The question is asking for this to be translated into hours per day, which equates to approximately 5.19 hours.

3 0

3 years ago

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The solutions of the quadratic equation Ax^2+Bx+C=0 are called roots and are given by a famous equation called the Quadratic For

schepotkina [342]

The roots of a quadratic equation depends on the discriminant $\Delta$ .

If $\Delta > 0$ , the quadratic equation has two real distinct roots, and it crosses the x-axis twice.
If $\Delta = 0$ , the quadratic equation has one real root, and it touches the x-axis.
If $\Delta < 0$ , the quadratic equation has two complex roots, and it neither crosses nor touches the x-axis.

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A quadratic equation has the following format:

$y = ax^2 + bx + c$

It's roots are:

$y = 0$

Thus

$ax^2 + bx + c = 0$

They are given by:

$\Delta = b^{2} - 4ac$

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

The discriminant is $\Delta$ .

If it is positive, $-b + \sqrt{\Delta} \neq -b - \sqrt{\Delta}$ , and thus, the quadratic equation has two real distinct roots, and it crosses the x-axis twice.

If it is zero, $-b + \sqrt{\Delta} = -b - \sqrt{\Delta}$ , and thus, it has one real root, and touching the x-axis.

If it is negative, $\sqrt{\Delta}$ is a complex number, and thus, the roots will be complex and will not touch the x-axis.

A similar problem is given at brainly.com/question/19776811

4 0

2 years ago

3 quarters of 20 cookies burned how many cookies burned

Mrrafil [7]

15 cookies burned because 3/4 =75% and 75% of 20 is 15

4 0

3 years ago

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