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jen4011
20.10.2020 •
Mathematics
Use the formula m =
Y2 - Y1/X2 – X1
to calculate the slope of the
line.
The slope of the line is ___.
* Answer is 2 *
(Made this for anyone that’s having a problem looking for it because I did)
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Ответ:
Confidence interval = [ 0.4432, 0.4968]
Step-by-step explanation:
Registered voters approved of the job Barack Obama was doing as president,
p = 47% = 0.47
Total sample size, n = 2,294
Confidence level = 99%
now,
confidence interval for the proportion of all registered voters who approved of the job Barack Obama was doing as president
= p ±![z\times\sqrt{\frac{p\times(1-p)}{n}}](/tpl/images/0392/9415/7e440.png)
for 99% confidence level, z value is 2.58
= 0.47 ±![2.58\times\sqrt{\frac{0.47\times(1-0.47)}{2294}}](/tpl/images/0392/9415/04ae8.png)
= 0.47 ± 0.0268
or
Confidence interval = [0.47 - 0.0268, 0.47 + 0.0268 ]
or
Confidence interval = [ 0.4432, 0.4968]