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Nat2105 [25]
3 years ago
7

How to add it because I don not know how to do it

Mathematics
2 answers:
koban [17]3 years ago
7 0
   1              3            4
1 --    +    1 --   =    2 --
   5              5            5

Explanation:

1 + 1 = 2
1/5 + 3/5 = 4/5<span />
miss Akunina [59]3 years ago
3 0
1 + 3 = 4 1+1 = 2      the answer is 2 4/5
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Answer:

Step-by-step explanation:

We can calculate this confidence interval using the population proportion calculation. To do this we must find p' and q'

Where p' = 14/100= 0.14 (no of left handed sample promotion)

q' = 1-p' = 1-0.14= 0.86

Since the requested confidence level is CL = 0.98, then α = 1 – CL = 1 – 0.98 = 0.02/2= 0.01, z (0.01) = 2.326

Using p' - z alpha √(p'q'/n) for the lower interval - 0.14-2.326√(0.14*0.86/100)

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Using p' + z alpha √(p'q'/n)

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= 0.466*0.057

= 26.5%

Thus we estimate with 98% confidence that between 12% and 27% of all Americans are left handed.

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shusha [124]
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