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notsponge [240]
3 years ago
6

the number of students in the tour sixth grade classes at northside school are 26 19 34 and 21 use properties to find the total

number of srudents in the four classes
Mathematics
1 answer:
AURORKA [14]3 years ago
3 0

what is the question then

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The manager of a supermarket wants to obtain information about the proportion of customers who dislike a new policy on cashing c
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Answer:

n = 61 costumers

Step-by-step explanation:

For calculating the number of costumers he should sample we use the next equation:

n = \frac{z_{1-\alpha/2}^{2}p(1-p)}{E^{2} }

                          Where E is the error that we are prepared to accept, in this  case E = 0.15

How we don't know the value of p, we can estimate it like p = 0.5

∝ = 1-0.98 = 0.02

1-∝/2 = 0.99

z_{0.99} = 2.33

n = \frac{(2.33^{2})(0.5)(1-0.5)}{0.15^{2} }

n = 60.32 costumers

n ≈ 61 costumers

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Answer:

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Step-by-step explanation:

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