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Find 99% Confidence interval for variance and st deviation of weights of 25 one gallon containers of motor oil ifa sample of 14 containers has a variance of 3.2 ounces.
If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
A shipment of 150 television sets contains three defective units. In how many ways can a vending company buy three of these units and receive (a) no defective units, (b) one defective unit, and (c) at least two good units?
The president of an agency specializing in public opinion surveys claims that approximately 70% of all people to whom the agency sends questionnaires responds by filling out an returning the questionnaire.
Using the 0.05 level of significance, is there evidence that the population mean is above $170?
a high school decides to add a new course that prepares randomly selected seniors to take a certain standardized test
Perform all of the calculations to complete this table and compute the chi-square statistic and calculate degrees of freedom for this chi-square test for goodness-of-fit.
question a statistics practitioner working for mlb wants to supply radio and television commentators with interesting
A microwave manufacturing company has just switched to a new automated production system. Unfortunately, the new machinery has been frequently failing and requiring repairs and service.
You observe the gender of the next 950 babies born at a local hospital. The random variable represents tha number of girls. historically , 49.8% of the babies born are girls?
consider again the study of the association between depression and cardiac disease survivability which showed that of
assume you are a consultant to an hmo that is being evaluated on how well it improves the health status of its enrolled
a large industrial firm uses 3 local motels to provide overnight accommodations for its clients. from past experience
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