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Question: Essay errors Typographical and spelling errors can be either "nonword errors" or "word errors." A nonword error is not a real word, as when "the" is typed as "teh." A word error is a real word, but not the right word, as when "lose" is typed as "loose." When students are asked to write a 250-word essay (without spell-checking), the number of nonword errors X in a randomly selected essay has the following probability distribution:
Assume that X and Y are independent. An English professor deducts 3 points from a student's essay score for each nonword error and 2 points for each word error. Find the mean and standard deviation of the total score deductions for a randomly selected essay. Show your work.
Also, 72 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
The same roulette wheel is spun two more times. What is the probability that a ball fall in a green bin at least once in the two spins, to three significant digits?
Recall the random variables of given Exercise that are uniformly distributed over the region - Find the conditional PDFs and Find the marginal PDFs.
Consider the linkages between politics, religion, and art in Mesopotamian and Egyptian societies. Provide a specific example and analyze how it responds to politics, religion, and art.
The ground floor of the campus building, what is the probability that at least 3 students selected are undergraduate students?
an electronics store has received a shipment of 25 table radios that have connections for an ipod or iphone. ten of
you measure the weight of 5 small birds for two years these are the resultsbird year 1 year 21 512 5002 510 4903 508
Plot your distances from the goal line against the number of the trial. What pattern do you see?- Compare your plot with those of other students in the class. In what ways do the plots differ?
Find the mean number of days until the total cholesterol level is safe (less than 200 mg/dL).- Find the probability that the total cholesterol level will be safe in a number of days within two standard deviations of the mean.
Find the probability that a standard normal random variable will have a value between -2 and 300.- Find the probability that a standard normal variable will have a value less than 10.
(a) Construct a stem-and-leaf display. (b) Construct a frequency histogram and interpret. (c) Construct a pie chart and interpret.
1. Describe the following variables as quantitative or qualitative, and describe the scales of measurement. A. The distance a student commutes from home to the Berkeley campus.
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