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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

Please log in or register to include a comment. Please log in or register to answer this question. 1 Answer 0 votes

**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

is the worth from the typical normal circulation showing the confidence level.is the preferred margin of error,

*p* is the propercent of successes in the populace,

*q* is the proportion of failure in the population.

**Step 2:**

Now uncover

score for 99 instances out of 100.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

*E, p*and also

*q*

*in .*

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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