If you know the answer to this question please help!! 7th grade math
1 answer:
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What we want to do first is isolate the variable. To do this we need to multiply each side by 5 to remove the fraction
5 * 5 = 5*
w
Simplify the right side
5 * w = 1w
Now simplify the left side
5 * 5 = 25
Then we get...
25 = w
There's your answer!
5 * 5 = 5*
Simplify the right side
5 *
Now simplify the left side
5 * 5 = 25
Then we get...
25 = w
There's your answer!
I have an expression
floating around in my head; let's see if it makes sense.
The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is
That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:
Plugging in the numbers,
One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.
So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.