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1. Suppose the proportion of rural voters in a certain state who favor a particular gubernatorial candidate is .45 and the proportion of suburban and urban voters favoring the candidate is .60. If a sample of 200 rural voters and 300 urban and suburban voters is obtained, what is the approximate probability that at least 250 of these voters favor this candidate?
2. Let m denote the true pH of a chemical compound. A sequence of n independent sample pH determinations will be made. Suppose each sample pH is a random variable with expected value m and standard deviation .1. How many determinations are required if we wish the probability that the sample average is within .02 of the true pH to be at least .95? What theorem justifies your probability calculation?
A new president at Big State University has made student satisfaction with the enrollment and registrations process one of her highest priorities.
the mean of iq is 100 and the standard deviation is 16. sarah is in the 92nd percentile. what is a possible iq score
alice and bob arrange to meet for lunch on a certain day at noon. however neither is known for punctuality. each is
the claim that the proportion of adults who smoked a cigarette in the past week is less than .30 and the sample
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
I have the t-score of 1.660 an a standard error of .036. I hope they are correct, but also need the test effect and test statistic, p-value.
to give a 99.9 confidence interval for a population mean ? you would use the critical valuea.z 2.576.b.z 1.960.c.z
The Executive Camera Company provides full expenses for its sales force. When attempting to budget automobile expenses for its employees, the financial department uses mileage figures to estimate gas, tire, and repair expenses.
What is the probability that the individual is a driver and what is the probability that the individual is male? What is the probability that both are transit users?
Finding the value of test statistic utilizing two-tail 't' test also interpret the result. The Commercial Bank as well as Trust Company is studying the use of its automatic teller machines.
iq data is thought to be normally distributed with a mean of 100 and a standard deviation of 15. using the emperical
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
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