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lyudmila [28]
3 years ago
12

The Census Bureau reports that 82% of Americans over the age of 25 are high school graduates. A survey of randomly selected resi

dents of certain county included 1110 who were over the age of 25, and 871 of them were high school graduates.Find the mean and standard deviation for the number of high school graduates in groups of 1110 Americans over the age of 25.
Mathematics
1 answer:
mihalych1998 [28]3 years ago
6 0

Answer:

Mean = 910.2

Standard deviation = 12.8

Step-by-step explanation:

82% over the age of 25 are high school graduates.

A survey randomly selected students of certain country included 1110 who were over the age of 25 and 871 of them were high school.

n = 1110

p = 82% = 0.82

q = 1 - 0. 82

q = 0.18

Mean = np

= 1110*0.82

= 910.2

Standard deviation = √npq

= √ 1110*0.82*0.18

=√163.836

= 12.8

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M is a degree 3 polynomial with m ( 0 ) = 53.12 and zeros − 4 and 4 i . Find an equation for m with only real coefficients (i.E.
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Answer:

Therefore the required polynomial is

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Step-by-step explanation:

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Since 4i is a complex number. Then the conjugate of 4i is also a zero of the polynomial i.e -4i.

Then,

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