3 years ago

3-2 to the power of 2

Mathematics

1 answer:

amid [387]3 years ago

7 0

Follow PEMDAS!

First E (exponent) so you'd do 2^2=4

Then S (subtract) so you'd do 3-4=-1

your answer is -1

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A. 9.7%

Step-by-step explanation:

margin of error:

z * $\sqrt{\frac{p(1-p)}{N} }$

n is sample size

z is the z score (for a 95% confidence interval you would use 1.96)

p is the sample proportion

to solve for 'p', remember that if a decimal value is given, use that. but if it is a whole number, then divide that number by the sample size, and substitute it into the formula.

in this case we are given 43% so 0.43.

in the formula :

1.96 * $\sqrt{\frac{0.43(1-0.43)}{100} }$