What is a third in 420

(0.6)2= ___? HELPPPPPP

Setler79 [48]

Answer:

1.2

Step-by-step explanation:

3 0

4 years ago

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The current process has a mean of 2.50 and a std deviation of 0.05. A new process has been suggested by research. What sample si

Novay_Z [31]

Answer:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

$n=(\frac{z_{\alpha/2} s}{ME})^2$ (2)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025,0,1)", and we got $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(0.05)}{0.02})^2 =24.01$

So the answer for this case would be n=25 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=0.05$ represent the population standard deviation

n represent the sample size (variable of interest)

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =0.02 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} s}{ME})^2$ (2)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025,0,1)", and we got $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(0.05)}{0.02})^2 =24.01$

So the answer for this case would be n=25 rounded up to the nearest integer

7 0

3 years ago

A bottle contains 34 gallon of fruit punch. If 6 people share the fruit punch equally, how much fruit punch does each person get

Feliz [49]

Answer:

17/3 or in decimal form, 5.67 gallons for each person.

Step-by-step explanation:

If 34 gallons of fruit punch will be shared equally with 6 people, just divide 34 by 6.

34/6 = 17/3 or in decimal form, 5.67 gallons for each person.

5 0

3 years ago

A company that sells home and kitchen products online is tracking the number of visitors on their website overnight to determine

marysya [2.9K]

Answer:

Either A or B, try B first

Step-by-step explanation:

3 0

3 years ago

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Janice works 8 hours per day on Fridays and Saturdays each week. She earns $9.70 per hour.

juin [17]

Answer:

I would say $155.20

Step-by-step explanation:

You multiply 9.70by 8 and the answer of 77.60 and 77.60 and u get ur answer I hope this helps u and if it doesn't sorry

4 0

3 years ago