A random sample of 100 record shops found that the average weekly sale of a particular record
Question:
A random sample of 100 record shops found that the average weekly sale of a particular record was 260 copies, with standard deviation of 96. Find the 95% confidence interval to estimate the true average sale for all shops. To compile the record chart it is necessary to know the correct average weekly sale to within 5% of its true value. How large a sample size is required?
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Given that x 260s96n100 aThe confiden...View the full answer
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Abdo Khedr
I hold a master degree of Applied Statistics. I have a long experience in teaching. I taught different statistic courses such as Pure Mathematics, Applied Statistics, Descriptive Statistics, Theory of Sampling, Operations Research, Statistical Inference, Advanced Mathematics, Mathematical Statistics, Numerical Analysis and Theory of probability and Distributions. I can analyze data using Excel an SPSS.
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Related Book For 
Statistics For Economics Accounting And Business Studies
ISBN: 978027368308
4th Edition
Authors: Michael Barrow
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