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Approximation the total number and bound on the error of estimation for proportion.
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
In a survey conducted to see how long Americans keep their cars, 2000 automobile owners were asked how long they plan to keep their present cars. The results of the survey follow. Find out the probability distribution associated with these data.
Find the probability that a randomly selected employee earns less than $5.43.
Write all the possible samples of size 2 and calculate the average or median of each one.
A study group of long distance phone calls made from the corporate offices of Pepsi Bottling Group, Inc., in Somers, New York, revealed the length of the calls, in minutes, follows normal probability distribution.
What are the best-case and worst-case outcomes the owner may face on this product if she implements your suggestion?
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
Two groups of students are asked to rank their preference for six types of soft drinks. The following table shows their rankings.
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Is there evidence of difference in mean life of bulbs produced by the two kinds of machines. What is your conclusion?
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
Use MegaStat's output for multiple regression to determine the multiple regression equation
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