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Part 1.
A cell company claims that at least 15% of its customers have 2 or more lines. The company selects a random sample of 500 customers and finds that 65 have 2 or more telephone lines. If α = 0.02, show all key steps and test whether the proportion is less than 15% using the critical value approach.
Part 2.
A generic medicine that claims to reduce fever and pain comes in 5 oz. bottles. Ted was suspicious about the volume of contents. He measured the volume of 15 randomly selected bottles and noticed that the mean is only 4.6 oz. with a standard deviation of 0.7 oz. Is the volume of the content not 5 oz.? Use the critical value approach to arrive at a conclusion. Show all key steps of the test of hypothesis. Use 0.10 level of significance. Assume that the volume of the contents follows a normal distribution.
Let Y= 1 if the two coins show the same thing (i.e., both heads or both tails), with Y= 0 otherwise. Let Z = X + Y, and W =XY.
Find two unpaired university data sets related to your work or business interests on the Internet, from your company, or at your library.
For any two real numbers u and v, max(u, v) := u iff u ≥ v; otherwise, max(u, v) := v. A metric space (S, d) is called an ultrametric space and d an ultrametric if d(x, z) ≤ max(d(x, y), d(y, z)) for all x, y, and z in R. Show that in an ultrametr..
The manager of a department store wants to determine what proportion of people who enter the store use the store's credit card for their purchases.
find the 98 confidence interval for the difference between two means based on this information about two samples.
Develop a 99% confidence interval for the population mean household income, assuming a normal distribution.
Develop a first draft policy and procedure for employee performance appraisal
What is the probability that exactly two accidents will occur in a particular two-day interval? What is the probability that one will have to wait at least two days to observe the next two accidents.
For a person in this group who has three? cards, what is the probability distribution for number of purchases made in a? week?
A researcher wonders whether males get paid more, on average, than females at a large firm. She interviews 50 employees and collects data
suppose you calculate a 99 confidence interval of 14.22 to 21.23. determine the margin of
A French company has an account payable to an affiliated US company in 90 days. The amount of the payable is €500,000.
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