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Solve this trouble. 0 votes(Use a TI-84)A newspaper article about the outcomes of a poll states: "In concept, the outcomes of a poll states: "In theory, the result of such a poll, in 99 situations out of 100 have to differ by no more that 5 percentage points in either direction from what would have been obtained by interviewing all voters in the USA," Find the sample size suggested by this statement.word-problemaskedApr 18, 2015in STATISTICSby doan12345Pupil
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Tip 1:
Marginal error is 5% .
You are watching: A newspaper article about the results of a poll states
< In either directions >
Find the sample size.
Formula for sample size is
where
p is the propercent of successes in the populace,
q is the proportion of failure in the population.
Step 2:
Now uncover
Follow these actions to evaluate z score for height 99 instances out of 100.
1.Select invNorm() in Ti -84 calculator.
< second --> VARS --> 3 >
2.Get in location in decimals .
invNorm((1 - 0.99)/2)
invNorm(0.005)
3.Now press Go into in calculator to see answer
invNorm(0.005) = - 2.575
|Z | score for 99 situations out of 100 is 2.575.
Step 3:
Let consider the worth p is 0.5.
So the value of q is
Marginal error is E = 0.05.
Now discover sample dimension n substituting
So the sample dimension n is 663.
See more: Where Do The Dolan Twins Live In California, The Dolan Twins Buy $2
Equipment :
The sample dimension is 663.
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