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Elanso [62]
3 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]3 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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Answer:

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4 0
2 years ago
Helpppp me pleaseeeee
tamaranim1 [39]

Answer:

Step-by-step explanation:

When you roll dice, there are 6 possible outcomes.  

In order to not roll a 6, you'd have to roll either 1,2,3,4,5.

So you have a 5:6 chance of not rolling a 6.

But they're asking you to use the chart.

Based on the chart, you've rolled the die 24+10+8+3+30+15=90 times.

Of those 90 times, you rolled a 6 15 times.

Which means you did not roll a 6 90-15=75 times.

Therefore the probability of not rolling a 6, based on the chart, is 75/90=83%.

Notice that 5/6=83% as well.  So this chart is fairly accurate.

Now for number 2.

Based on the chart, odd numbers appear 24+8+30=52 times out of the 90.

So we can say that odd numbers show up 52/90=58% of the time.

If James is rolling the cube 250 times, we know odd numbers will show up 58% of the time so, .58*250=144 is how many times we can expect to see an odd number appear.

6 0
3 years ago
What is a = 1/2 (b-c) if b is the subject
natulia [17]

Answer:

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Step-by-step explanation:

Given

a = \frac{1}{2} (b - c)

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5 0
2 years ago
Please explain step by step​
JulijaS [17]
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2. Calculate the volume of the "missing"
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6 0
3 years ago
The radius of a circle is 1 centimeter. What is the circle's circumference?
igomit [66]

Answer:

6.28 cm

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If we let pi = 3.14 and r = 1 cm, then the circumference of this circle is

C = 2(3.14)(1 cm) = 6.28 cm

6 0
3 years ago
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