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Question: A study of the home pages of Fortune 500 companies reports that the mean number of bad links per home page is 0.4 and the mean number of spelling errors per home page is 0.16 (N. Tamimi, M. Rajan, and R. Sebastianella, Benchmarking the Home Pages of Fortune 500 Companies, Quality Progress, July 2000). Use the Poisson distribution to find the probability that a randomly selected home page will contain
a. exactly 0 bad links.
b. 5 or more bad links.
c. exactly 0 spelling errors.
d. 10 or more spelling errors
The following table is partial probability distribution for the MRA Company's projected profits ( x= profit in $1000s ) for the first year of operation x f(x) -100 .10 0 .20
If observations are sampled from a distribution that appears to be normal, does this suggest that the mean should be preferred over the trimmed mean and median?
What do the results suggest about the sample group?
During a bear market, 140 investors were asked how they were adjusting their portfolios to protect themselves. Some of these investors were keeping.
At a certain university, 28% of the students major in zoology. Of all the students majoring in zoology, 68% are males. It is also known that 56% of all students at the university are male. Let Z represent the event that a randomly chosen student i..
the market price for a certain product is 5 per unit and occurs when 14000 units are produced. at at price of 1 no
Conduct a test to determine whether blood lactate level (y) is linearly related to perceived recovery (x). Use alpha = .05. Find the p-value for testing the hypotheses you gave in the previous problem. Show all decimal places in your answer.
What features of the distribution can you see in both the histogram and the boxplot?- What features of the distribution can you see in the histogram that you could not see in the boxplot?
If a student studies for 15 hours, what score should the student expect on the next. What percent of the variation in the points earned on the exam is explained by the number of hours the student studies?
the strength of ones immune system can be evaluated in several ways. one of the most popular methods involves measuring
Create and interpret a 90% confidence interval for the difference in mean delay, and comment on the assumptions that underlie your analysis.
The average particulate concentration, in micrograms per cubic meter, was measured in a petrochemical complex at 36 randomly chosen times- Is the histogram approximately normal?
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