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trapecia [35]
3 years ago
7

Please help please help

Mathematics
2 answers:
Firdavs [7]3 years ago
8 0

Answer:

reeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Step-by-step explanation:

koban [17]3 years ago
4 0
35. is c : square root of 64 is 8 and the square root of 8 can be simplifed to 4 x 2, square root of 4 is 2

36 is d : Denominator of the fraction represents what it is being rooted by and the numerator is what the regular number is squared by.
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A union of restaurant and foodservice workers would like to estimate the mean hourly wage, μ, of foodservice workers in the U.S.
pav-90 [236]

Answer:

n=(\frac{1.960(2.25)}{0.35})^2 =158.76 \approx 159

So the answer for this case would be n=159 rounded up to the nearest integer

Step-by-step explanation:

Assuming this complete question: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, , of foodservice workers in the U.S. The union will choose a random sample of wages and then estimate using the mean of the sample. What is the minimum sample size needed in order for the union to be 95% confident that its estimate is within $0.35 of ? Suppose that the standard deviation of wages of foodservice workers in the U.S. is about $2.15 .

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=2.25 represent the population standard deviation

n represent the sample size  

Solution to the problem

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =0.35 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

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}=1.960, replacing into formula (b) we got:

n=(\frac{1.960(2.25)}{0.35})^2 =158.76 \approx 159

So the answer for this case would be n=159 rounded up to the nearest integer

3 0
2 years ago
Kate and David each have $10. Together they flip a coin 5 times. Every time the coin lands on heads, Kate gives David $1. Every
olga55 [171]

Answer:

4 possible ways this could happen

Step-by-step explanation:

1. $11

2. $12

3. $13

4. $14

hope this was helpful

8 0
3 years ago
Need help on hw
Katyanochek1 [597]

Answer:

Perry started with 40 stamps

Step-by-step explanation:

If perry is starting with 40 stamps and gets rid of half of them he will have 20 stamps + 20 stamps would be 40.

7 0
3 years ago
How do you find the surface area of a octahedron
Alenkasestr [34]
If it's a regular octahedron, then you can calculate it using the formula 2\sqrt3a^2 where a is the length of the edge.
If it's not regular, you have to calculate the area of each side individually.

6 0
3 years ago
DIRECTIONS: Type your answer in the space provided. The slope must be in fraction form.
Elanso [62]
DIRECTIONS: Type your answer in the space provided. The slope must be in fraction form.
What is the equation of the line parallel to the given line through the point (14,0)?

-4x - 7y = 14
5 0
2 years ago
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