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You are asked by owner of Starshine Motel to create the customer satisfaction survey to find out the percentage of customers who are dissatisfied with service. In past year, 20,000 customers were serviced. She wants 95% level of confidence with the allowable statistical error of +/- 0.02. From past estimates, manager thinks that about 4% of customers have expressed dissatisfaction. What sample size must you use for this survey?
I want to estimate within $10 the mean salary of all graduates who were business majors in college. How many business majors would be needed to estimate the mean salary to within 10 with 95% confidence if the population standard deviation is $200.
A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, µ =58.A random sample of 14 individuals who listen..
Net sales of the Kaiser Aluminum and Chemical Corporation for the period beginning in 1975 and ending in 1984 were:
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.
Compute a 99% confidence interval for the true average number of months taken by bankruptcy petitioners to acquire debts listed on their petitions.
A coin tossed 100 times and 530 heads appear. At a=0.05, test the claim that this is a non biased coin. Use a P-Value. does this suggest the coin is fair?
Assume that the population means are to be estimated from the sample described below. Use the sample results to approximate the margin of error and 95% confidence interval
Is it reasonable typical worker does not miss any days during a pay period?
A teller can process an average of 100 customers per hour, which also can be modeled by a Poisson distribution. If there is one teller on duty, determine:
When there are multiple observations per subject, what issues are there with doing a MNL and an ordered logit model, answer in detail and provide example.
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make? Please provide step by step solution.
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