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5.70 The ideal number of children. “What do you think is the ideal number of children...

5.70 The ideal number of children. “What do you think is the ideal number of children for a family to have?” A Gallup Poll asked this question of 1020 randomly chosen adults. Slightly less than half (48%) thought that a total of two children was ideal Gallup announced a margin of error of ±4 percentage points for this poll. What is the probability that the sample proportion p^ for an SRS of size n = 1020 falls between 0.44 and 0.52? You see that it is likely, but not certain, that polls like this give results that are correct within their margin of error.

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Answer #1

ANSWER::

***please correct your question some errors is there...one line missing

given that

n=1020

True proportion =P=0.48

we have to find

since we know that

now

=P(Z<2.56) -P(Z<-2.56) =0.995-0.005 =0.990

(OR)

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