SOLUTION: 1. Say I take a random sample and all I know is the mean and standard deviation for that sample. How would I estimate the population mean? 2. How do I know if a confidence int

Question 1046798: 1. Say I take a random sample and all I know is the mean and standard deviation for that sample.
How would I estimate the population mean?
2. How do I know if a confidence interval is appropriate to use? Does a scenario have to meet a certain criteria?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

An example that may help to clarify Your questions
A sample of 89 golfers showed that their average score on a particular golf course was 90.98
with a standard deviation of 6.47.
and state the final answer to at least two decimal places.):
-------------------
x=bar = 90.98
(A) Find the 98% confidence interval of the mean score for all 89 golfers.
ME = 2.3263[6.47/sqrt(89)] = 1.5955
-----
CI: 90.98-1.5955 < u < 90.98+1.5955
CI: 89.3845 < u < 92.5755

RELATED QUESTIONS
A random variable is normally distributed. It has a mean of 245 and a standard deviation (answered by CPhill)

I'm not sure if this is the right place to post this but I'm pretty stuck. I'm having a... (answered by rothauserc)

I'm not understanding this chapter that we are on this week. I need help! Thank you. (answered by stanbon)

Roll a fair die five times. List the results and take all random samples of size n = 3.... (answered by MathLover1,ikleyn)

I found where someone answered this problem...Stan H. However, I didn't understand how... (answered by stanbon)

The mean weight of trucks traveling on a particular section I-475 is not known. A state... (answered by stanbon)

Assume that a sample is used to estimate a population mean μ. Find the 99.5% confidence... (answered by Boreal)

Find 80%, 85% and 99.9% confidence interval for the sample mean of a population, if we... (answered by Theo)

Find 80%, 85% and 99.9% confidence interval for the sample mean of a population, if we... (answered by robertb)