Margin of Error that Corresponds to the Given Values

Find the margin of error that corresponds to the given values of n (times) and x (successes) and the degree of confidence: n=1400, x=420, 95%. Go 3 decimal places of precision. Does not want upper or lower limits wants to calculate value for E.

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What differentiates a z test statistic for a population from the z statistic for a sampling of means? Why the difference?
Consider a normal population with μ = 43 and σ = 5.2. Calculate the z-score for an x ̅ of 46.5 from a sample of size 16.
Find the critical value z a/2 thatcorresponds to thegiven confidence level.

(1) The confidence interval: 5.06 < sigma2 < 23.33 is for the population variance based on the following sample statistics:
n = 25, x-bar = 41.2, and s = 3.1
What is the degree of confidence? Use only integers, no % sign and no decimal places.
(2) Find themargin of error.
95% c

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a. At 95% confidence, what is themargin of error?
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A researcher is interested in determining the average number of years employees of a company stay with the company. If past information shows a standard deviation of 7 months, what size sample should be taken so that at 95% confidence themargin of error will be 2 months or less?"

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1. Assume that a randm sample is used to estimate a popultion proportion p. Find themargin of error E thatcorresponds to thegiven statistics and confidence level.
98% confidence; the sample size is 1206, of which 35% are successes
Themargin of error E= ______ (round to four decimal places as needed)
2. Use the give