I need to find out how to calculate the margin of error when given the data: c=95; s=0.10; n=20; x(bar) = 1.5 and how to construct a confidence interval of the population mean. This example is similar to my studies.

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For a 95% confidence level, note that the degree of freedom is n-1=19, we have
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In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta restaurant, data were collected for a sample of 49 customers. Assume a population standard deviation of $5.
a. At 95% confidence, what is themargin of error?
b. If the sample mean is $24.80, what is the 95% confidence interval for th

Based on a simple random sample of one hundred an analyst estimates the average hourly wage earned by workers in a city to be $30 and computes themargin of error to be $5. Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for themargin of error?

I) Find the minimum sample size you should use to assure that your estimate of p will be within the required margin of error around the population p.
1) margin of error:0.01; confidencelevel:95%; from a prior study p is estimated by the decimal equivalent of 55%.
2) Margin of error: 0.007; confidencelevel: 98%; p and q u

I am trying to calculate the maximum tolerable error given a sample size. I am given the standard deviation and I have been told that the mean is within 1 of the population mean. Without the actual mean, how can I calculate the maximum tolerable error?
I am using:
maximum allowable error = (z-value * standard deviation)/sq

1. When we say we have a confidencelevel of 95%, what do you think our "margin of error" is?
2. If we move thelevel of confidence from 95 to 99%, what will happen to our margin of error? What will happen to the width of our confidence interval?
3. Would we have gotten a better feel for the amount of flour needed if we'd

I am having problems with these sample problems. Can you please help me? I have attached the following questions within an excel sheet for your usage in deriving the solutions.
A 90 % confidence interval for a situation is developed and is given by the following 48 < ยต < 64.
a) Give the value of the sample mean that was us

This problem is solved:
Let's summarize the method for findingthe 95% confidence interval using a step-by-step illustration. Suppose that a certain automobile company wishes to determine the expected miles per gallon for one of its new models. Based on years of experience with cars, the company statistician realizes that not

# 1. use the sample data andconfidencelevel to construct theconfidence interval estimate of the population proportion p.
n= 550, x= 440, 95% confidence
< p <
#2 use the given confidenceleveland sample data to find (a) themargin of errorand (b) theconfidence interval for the population mean m. assume that t