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motikmotik
2 years ago
13

Order of Operations

Mathematics
1 answer:
Rzqust [24]2 years ago
8 0

Answer:

answers are 3 and 62

Step-by-step explanation:

the answers were give above. If further instruction needed lmk :)

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To estimate a population mean, the sample size needed to provide a margin of error of 3 or less with a 95% confidence when the p
Over [174]

Answer:

The minimum sample needed to provide a margin of error of 3 or less is 52.

Step-by-step explanation:

The confidence interval for population mean (<em>μ</em>) is:

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

The margin of error is:

MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

<u>Given:</u>

MOE = 3

<em>σ </em>= 11

The critical value for 95% confidence interval is: z_{\alpha /2}=1.96

**Use the <em>z</em>-table for critical values.

Compute the sample size (<em>n</em>) as follows:

MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=1.96\times \frac{11}{\sqrt{n}}\\n=(\frac{1.96\times11}{3} )^{2}\\=51.65\\\approx52

Thus, the minimum sample needed to provide a margin of error of 3 or less is 52.

7 0
2 years ago
Which expression below are equivalent to 2(2x + 1)
emmainna [20.7K]

Answer:

4x+2

Step-by-step explanation:

you are doing distributive property so the answer could possibly be: 4x+2

7 0
3 years ago
Sketch a normal curve has a mean of 95 standard deviation of 12​
horrorfan [7]

is this a question or do you want us to draw sketch an actual line

4 0
3 years ago
Chad stop and fill the car with 11 gallons of gas he had driven 308 miles is in the previous 11 gallons of gas how many miles pe
Mrrafil [7]
308 miles per 11 gallons.

You need to find the amount of miles per 1 gallon.

dived the number of miles over gallons.

will look like:

miles
----------
gallons

it will look like for this problem

308
-------
11



308
-------- =28
11



28 miles per 1 gallon
4 0
3 years ago
What is 5 7/10 plus 3 1/3?
Xelga [282]

Answer:

5 31/30 or 181/30

Step-by-step explanation:

5 0
2 years ago
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