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olga2289 [7]
3 years ago
14

Calculate 21+23+25...+81

Mathematics
1 answer:
motikmotik3 years ago
4 0

Answer:

150

Step-by-step explanation:

Have a great night. ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎

︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎

︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎

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A study done by researchers at a university concluded that ​% of all student athletes in this country have been subjected to som
Nostrana [21]

The missing digits is highlighted in bold form

A study done by researchers at a university concluded that ​70% of all student-athletes in this country have been subjected to some form of hazing. The study is based on responses from 1800 athletes. What are the margin of error and​ 95% confidence interval for the​ study?

Answer:

Step-by-step explanation:

Given that:

The sample proportion \hat p = 0.70

The sample size n = 1800

At 95% confidence interval level:

The level of significance = 1 - 0.95 = 0.05

Critical value: Z_{0.05/2} = Z_{0.025} = 1.96

Thus, the Margin of Error E = Z_{\alpha/2}  \times \sqrt{\dfrac{\hat p ( 1- \hat p)}{n}}

= 1.96  \times \sqrt{\dfrac{ 0.70 ( 1-0.70)}{1800}}

= 1.96  \times \sqrt{\dfrac{ 0.70 ( 0.30)}{1800}}

= 1.96  \times \sqrt{\dfrac{0.21}{1800}}

= 1.96  \times \sqrt{1.16666667\times 10^{-4}}

the Margin of Error E = 0.021

At 95% C.I for the population proportion will be:

= \hat p \pm Z_{\alpha/2} \sqrt{\dfrac{\hat p(1- \hat p)}{n}}

= 0.70 ± 0.021

= (0.70 - 0.021, 0.70 + 0.021)

= 0.679, 0.721)

6 0
3 years ago
The difference between 4 and the product 6x is 40
mote1985 [20]
This would be written as 4-6x=40, then you subtract 4 from both sides to get -6x=36 which simplifies to x=-6.

:)
5 0
3 years ago
Solve this Expression below : W -1/4 = 3 /7 .So that the Question is to Solve for W. ​
mezya [45]

W-1/4= 3/7

W-1/4+1/4= 3/7+1/4

find the common denominator for the fractions

common denominator is 28

Multiply by 4 , top and bottom for 3/7

Multiply by 7 , top and bottom for 1/4

W= 12/28+7/28

W= 19/28

Answer is W= 19/28

4 0
4 years ago
What is the absolute value of -645
Liula [17]
-645 you can't simplify any further
5 0
3 years ago
Read 2 more answers
‼️‼️‼️‼️20 POINTS‼️‼️‼️‼️ I have no idea how to do this. Please as were it for me or tell me the exact formula to use. DO NOT JU
LenKa [72]

Answer:

3/-5

Step-by-step explanation:

Rise over Run is what Slope is. So basically we look at it and go how do we get from -6 to -3? Well you add 3, so thats your top number. We look at the bottom of the fractions now. We use the same thought process. How do you get from 14 to 9? Subtract 5. So our slope is 3/-5. Hope this helps

5 0
3 years ago
Read 2 more answers
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