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Q1) Pilot survey of ages of country residents is taken and originally shows and average age of 33.5 years with standard deviation of= 5.2 years. Researcher now wishes to do a full survey and to create the estimate of average age of population of country residents with 95% confidence and with precision of evaluate of plus and minus 1.5 years. How large sample will be needed?
Q2) In the political survey , where opponents are probable to be relatively close in terms of percent of vote that they will receive, how large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
Determine the range and standard deviation of the times.
If we were to ask three people at arbitrary, determine the probability that they will all prefer punk rock?
What is the city mileage standard deviation for this SUV model?
Do you benefit by using a cum sum chart rather than a control chart?
At the .01 significance level, is there a relationship between job pressure and age?
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Determine the likelihood of accepting a lot which is 1% defective?
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