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worty [1.4K]
3 years ago
11

Plz help with these.

Mathematics
1 answer:
kirill115 [55]3 years ago
6 0

Answer:

5. a ( x + y^{2} + z )

6. 2a ( x + y + z)

7. 4 ( x +4y)

8. -5 ( x + y )

9. 7a ( a + b)

10. -2 ( x + 2y + 3z)

11. bx ( a + y)

12. -x (x^{2}  + x + 1)

this took long but i hope the answers are correct :)

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A sample of 997 is needed.

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In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

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How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

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