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3 years ago

Solve the division problem. -1 3/5 divide (-2/3) write as a mixed number.

Mathematics

1 answer:

kodGreya [7K]3 years ago

6 0

First you make -1 3/5 into an improper fraction, -8/5

Since you're dividing a fraction by another fraction you'd change it to -8/5 × -3/2

(Don't forget to flip -2/3 to -3/2)

when you multiply it it'd be 24/10

(It is a positive number because when you multiply two negative numbers it becomes positive)

24/10 as a mixed fraction is 2 1/5

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a. Find the standard deviation of the sample proportion based on the null hypothesis

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z= $\frac{X-p_{o} }{\frac{s}{\sqrt{N} } }$ where

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s is the standard deviation (0.4770)
N is the sample size (300)

putting the numbers in the formula:

z= $\frac{0.46-0.35} }{\frac{0.4770}{\sqrt{300} } }$ = 3.9945

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