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What is the overall response rate for the 8000 names? He also notices the sensible fact that in general, the more dollars a person has spent on Luna products, the higher the response rate to the mailing. Yet, the 1000+ category appears to contradict this, by being lower than the value for the 600-999 category. (Q2): Define p = the true proportion of responses for the 1000+ category on the entire database. Use hypothesis testing, with ? = .05, to test H0: p ≥ .059 vs. H1: p < .059 In essence, if we accept H0, we can "relax," and not worry that a competitor is targeting our best customers, and that the lower value in the 8000 names (4.9% or .049) is just sample error, and not indicative of a real drop in response rate.
If you record data for a year, and find that the mean number of women in shelters is 250, with a standard deviation of 75, and the distribution is normal, answer this. If the city's shelters have a capacity of 350, will that be enough places for the ..
Explain clearly what is meant by a false negative rate of 5% and a false positive rate of 15%. If the population were screened, what proportion would be expected to test negative for metropathy?
A population that starts at 100 and doubles in growth every eight years: The expression would give the population t years after the growth starts.
Write a paragraph describing your interpretation when the slope is positive, zero, and negative. If you were buying a home in this particular city, which slope would be most attractive to you and why?
Forecast sales for the next day using a three-day weighted moving average where the weights are 3, 1, and 1 (the highest weight is for the most recent number).
What is the null and alternative hypothesis? What is your final conclusion?
Market researchers would like to know if customers prefer a well-known brand over a generic brand of soft drink. They give a large sample of people the two drinks to taste in a random order and ask them which one tastes better.
A local Junior High principal has decided to give an award to any student who scores in the top 15% of statewide scores. How high should a student score be to win this award?
The time required to assemble a part of a machine follows an exponential probability distribution with a mean of 14 minutes. What is the probability that the part can be assembled in 7 minutes or less?
If you were to conduct right-tailed hypothesis test at 5% significance level, you choose the critical value this way. Assuming that the null hypothesis is true
If an employee is selected for promotion, find the probability that the employee will be under 25 or a female. Express your answer as a fraction in lowest terms.
Perform an exponential smoothing forecast with α=0.3 with the following data. Use the demand for the month of January for the initial forecast.
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