In a sample of 200 observations, there were 80 positive outcomes. Find the standard error for the sample proportion.

Answers

Answer 1

Answer:

The standarderror for the sample proportion 0.3995.

What is Standard Error?

The population mean's likelihood to differ from a sample mean is indicated by the standard error of the mean, or simply standard error. It reveals how much the sample mean would change if a study were to be repeated with fresh samples drawn from a single population.

given:

n= 200

and possible outcomes= 80

Standard deviation = √(80²/200)= 5.65

Now, standard error = $\sigma$ / √n

= 5.65/√200

= 0.3995

Hence, the standard error for the sample proportion 0.3995.

Learn more about standard error here:

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Answer 2

Answer:

Answer:

Step-by-step explanation:Consider the quadratic function f(x) = x2 – 5x + 6.

What are the values of the coefficients and constant in the function?

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Divide £300 in a ratio of 3:7

Answers

Ratio is:
$3:7$
it means you have to sum
$3+7=10$
Now you have to divide $300$ by $10$
$300/10=30$
Now multiplay
$3*30=90$
and
$7*30=210$
so £ $300$ in ratio $3:7$ will be $90:210$

1. Add 3 + 7 = 10

2. Divide 300 by 10 = 30

3. Times 30 x 3 = 90

4. Times 30 x 7 = 210

90 + 210 = 300

your answer is 90 : 210

two minutes after a skydiver opens his parachute, he has descended 1,900 feet. after 5 minutes, descended 4,750 feet. if the distance varies directly with the time, at what rate is the skydiver descending?

Answers

1,900 ft/ 2 minutes= 950 ft/minute.

4,750 ft/ 5 minutes= 950 ft/minute.

If the distance varies directly with the time, the skydiver is descending at a rate of 950 feet per minute~

1900/ 2= 950

4750/5= 950
Why do you do this? Because you are trying to find the amount of ft per minute.

Find the average of
1.6,0.8,1.2

Answers

Add all three and then divide by the number of varibles which in this case is three. Answer is 1.2

1.2 is the average.I did:1,6+0.8+1.2=3.6. 3.6 divided by 3 is 1.2 hope my answer helped.

Consider the decimal 0.101001000100001000001 do you think this decimal represents a rational number? Why or why not.

Answers

this decimal does not represent a rational number because rational numbers are whole numbers, numbers that can be written as a fraction

Please help and explain. :)

Answers

a. Okay, so you multiply the 4.7 and 2.9 together, and then add the exponents

13.63 * 10^10

But we are not done. There can only be one digit in front of the decimal point. So, you move the 13.63 back one place so 1.363. But we have to do this to both sides, so the answer is 1.363 * 10^11.

b. Now you divide the 5.8 and 2, and subtract the exponents.

2.9 * 10^-5

The negative exponent is fine in this case if you were wondering.

c. Expand the scientific notation to 1500, then add the 2491 and then put that in scientific notation is what I would do. You can also express 2491 in scientific notation and add them. Either way you will get 3.991 * 10^3

d. Same thing here except with subtraction. The answer is 6.5 * 10^-4.

This was a little long, sorry. Let me know if you need further explanation. I hope this helps.

Please explain.
Use properties to find the sum or product.
89+27+11

Answers

Ok, Josh! So, first, ask yourself, what are they asking? They are asking to use properties to find the product, of course! Now, think of what you are doing out of addition, subtraction, multiplication, and division. That was easy. Addition! So you need to find the sum. Obviously that was the easy part. We need to add the smaller numbers first. So:

27 + 11 = Y (Y will be the answer that you will find.
Then you would add:
Y + 89 = X (X = the final answer)
I hope I helped! :D

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