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If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100), calculate the mean and spread of the comparison distribution.
The number of runs with respect to the sample median is:
You are the sales manager of a life insurance agency. All of your sales representatives are successful in selling a policy on 30% of their sales calls. Determine the probability of a sales representative's selling at least four policies if he (she..
In a regression analysis involving 30 observations, the following estimated regression equation was obtained.
Operators are to answer telephone calls from customers in an average time of 0.1 minute or less, and either respond to or refer to the proper department within 0.5 minute.
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
Compute the Relative risk (RR) of ADR with Drug A compared to Drug B. Show all calculation. Interpret the RR value. Do you arrive at the same conclusion based on the OR estimate and RR?
The owner of a small computer store personally sells one computer per week on the average. Use the Poisson distribution to find the probability of randomly selecting a week in which she personally sold three computers.
The consultant is given a sample of 225 batteries to test. A. Calculate the standard error of the mean.
Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
No estimate of the population proportion is available. How large a sample is required?
Micron Electronics makes both desktop and laptop personal computers that they sell directly to customers by phone or over the Internet.
To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with:
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