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Consider rolling a fair 6-faced die twice. Let A be the event that the sum of the two rolls is atmost 6, and B be the event that the first one is an even number.
(a) What is the probability that the sum of the two rolls is at most 6 given that the first one is an even number?
(b) Are event A and event B independent? Explain.
The data given below are taken from two independent samples collected randomly. What is the value of test statistics?
How many returns must he get in order to know the proportion that will support the bond issue within a standard error of 5% and a confidence level of 95%?
a refrigerated delivery truck has a load of perishable goods worth 10000. if the refrigeration unit is not cold enough
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You are curious about whether the professors and students at your school are of different political persuasions, so you take a sample of 20 professors and 20 students drawn randomly from each population.
Effect of Screening Mammography on Breast-Cancer Incidence
You need to estimate the mean Christmas sales across a large chain of jewelry stores. You want to estimate this mean value to within $100 with 99% confidence
martindate were tester which can compare two materials in sigle run, weights losses from seven runs. Examine these data by creating the 90% confidence interval for difference of means. Define your assumption.
It would like to be within plus or minus $55 of the true mean with a 95% confidence level. The standard deviation is thought to be $700. How many card holders should be sampled?
An adaptive cluster sample initially selects a random sample of n = 4 strips from the N = 25 in the study region. Each strip contains M = 12 secondary units. Neighborhoods are defined to include adjacent secondary units as in the example in the te..
efficacy of a drug. seventy-five 75 people with hypertension were given a new drug for the treatment of their
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
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