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Out of a total of 10 college textbooks estimate the standard devialtion of their ages if the oldest textbook is known to be 7.9 years old and the newest textbook is 1.3 years old.
during a national debate on changes to health care a cable news service performs an opinion poll of 500 small-business
The publisher of Celebrity Living claims that the mean sales for personality magazines that feature people such as Angelina Jolie or Paris Hilton are 1.5 million copies per week.
let w be x212a determine the mean and the variance of wb find d1d2d3 and d4 so that pw gt d1 0.05 p w gt d2 0.99 pw
a questionnaire sent through the mail as part of a market research study consists of eight questions each of which can
a law firm takes cases on a contingent fee basis. if the case goes to trial the firm expects to earn 25000 as part of
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
Formulate the null and alternative hypotheses for a hypothesis test. Identify the population and describe how to select a random sample for a hypothesis test. State in clear terms the conclusion that should be given if the null hypothesis is rejec..
could mud-wrestling be the cause of a rash contracted by university of washington students in the spring of 1992? two
As part of a data base on new births at a hospital some variables recorded are the age of the mother, marital status of the mother (single, married, divorced, other), weight of the baby, and sex of the baby. Of these variables
In this study we will consider the current issues of operational expenses in relation to the number of staff and number of branches being experienced by 123 Finance Inc.
Professors at a local university earn an average salary of $80000 with a standard deviation of $6000. The salary distribution is approximately bell-shaped. What can be said about the percentage of salaries that are at least $74,000
The resistances of carbon resistors of 1500 ohm nominal value are normally distributed with µ = 1500 and standard deviation = 200. What proportion of resistors is expected to have resistance greater than 1150 ohm?
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