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Elanso [62]
2 years ago
14

2. Discuss how you might select a random sample to estimate the population mean rating of all 100 computer games.

Mathematics
1 answer:
Vlada [557]2 years ago
4 0

Answer:

n = \frac{NZ^{2}_{1-\alpha/2}\sigma^{2}}{E^{2}(N-1)+Z^{2}_{1-\alpha/2}\sigma^{2}}

Step-by-step explanation:

For calculating how large is a sample size that is large enough for estimating the population mean, we should consider the error that we are ready to agree, because the sample size depends on this error.

If your error is α, the sample size would be:

n = \frac{NZ^{2}_{1-\alpha/2}\sigma^{2}}{E^{2}(N-1)+Z^{2}_{1-\alpha/2}\sigma^{2}}

Where N: the population size, in your case N = 100

            δ: the standar deviation

            Z:  the value associated to the error in the standard normal table

            E: error

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I need help fast!!!!!
Vesna [10]
-48 is the answer to the question

mean = Summation of Data/Number of Data Added

mean = [(-54)+(-32)+(-70)+(-25)+(-65)+(-42)] / 6

mean = -288 / 6
mean = -48
7 0
2 years ago
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Alicia had - $11.00 in her
lana [24]

Answer:

$42

Step-by-step explanation:

It's $42 because 11+44.50 is 54.50 and then you take out 6.25 twice because it's her and one friend to get 42 dollars. Hope this helps!

7 0
2 years ago
I need help PLEASE!!!
Hitman42 [59]

Answer:

1. ∠A and ∠B are right angles.                      Given

2. m∠A = m∠ B                                               All right angles are congruent.

3. ∠BEC≅ ∠AED                                              Vertical angles are congruent

4. ΔCBE ~ ΔDAE                                               AA

Step-by-step explanation:

A proof always begins with the givens.

1. ∠A and ∠B are right angles. -------------->Given

2. m∠A = m∠ B  are equal since----------->  All right angles are congruent.

3. ∠BEC≅ ∠AED  are also equal since---->Vertical angles are congruent

4. ΔCBE ~ ΔDAE since two angles are equal----------> AA

7 0
3 years ago
Does x+ y &lt; -4 have a solution?<br>​
horsena [70]

Answer:

infinite solutions :)

Step-by-step explanation:

infinity solutions, there is infininte possibilitys.

6 0
3 years ago
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The perimeter, P, of a rectangle is the sum of twice the length and twice the width.
LekaFEV [45]
The answer is P = 2(l+w) units.

This is because when you let the perimeter of the rectangle be P, the length of the rectangle be l and the width of the rectangle be w.

The information above can be expressed as the following equation,
P = 2l + 2w

You can then factorise out the common factor, 2.
P = 2(l+w)

Thus, the answer is P = 2(l+w) units.
3 0
3 years ago
Read 2 more answers
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