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1. In your own words explain the difference between a point estimate and an interval estimate of a parameter? Which is better? Why?
2. What information is necessary to calculate a confidence interval? Is the size of the population relevant when one is determining the sample size for a confidence interval? What is necessary to determine the sample size?
3. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. He wants to be 90% confident that his estimate is correct. If the standard deviation is 4.8, how large a sample is needed to get the desired information and to be accurate within 0.65 decibels?
explain two charateristics.and two aapplication ofics statist
The national demand and price for a certain type of energy-efficient exhaust fan are related by p=441-3/7q, where p is the price and q the demand. The price and supply of the exhau
In Ireland, Davoren et el (2015) report that that 65.2% of male University students self-reported alcohol consumption levels which are classified as hazardous. A random sample of
What is regression analysis ? Discuss the relation between ''correlation coefficient'' and the ''regression coefficients''?
Stability Criterion A survey of periodic table carefully reveals that those elements in which N / Z = 1 or 1.6 are stable. Amongst these, the elements having even N and even Z ar
comulativefrequencydistribution
Administering agency solutions A professional specific by the Office of Economical Control to provide common management of economic sales action. An administering agency is also a
difference between historigram and histogram
Obtain the critical value (or values) for a hypothesis test for the mean if you conduct: (a) an upper tail "z" test at the 1% level of significance. (b) a two-tailed "z" test
what is base case NPV?
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