On average, a textbook author makes 2.5 word-processing errors per page on the first draft of...
A typist makes an average of 5 typo errors per page that she types. If the number of errors per each typed page can be modeled according to the Poisson distribution, what is the probability that she will make more than 3 typo errors in the next page?
The mean number of errors per page made by a member of the word processing pool for a large company is thought to be 1.8 with the number of errors distributed according to a Poisson distribution. If a page is examined, what is the probability that more than two errors will be observed? The probability that more than two errors will be observed is ___________?
Suppose an author makes on average one typographical error in every 3 pages he writes. If the number of typos in his next, 300-page book follows a Poisson process, what is approximately the probability that there will be more than 115 typos in this book?
A writer makes on average one typographical error every page. The writer has landed a 3-page article in an important magazine. If the magazine editor finds any typographical errors, they probably will not ask the writer for any more material. What is the probability that the reporter made no typographical errors for the 3-page article? Use the Poisson distribution and round answer to 4 decimal places.
The number of errors in Abel’s presentations has a mean of 2 per page. The moderator randomly selects one page, what is the probability that a) there is no error and b) there are 5 errors
An educational psychologist hypothesizes that individuals not using a word-processing grammar-checker will make more grammatical errors in a hand-written draft. At a local university, the average number of errors per page is 7 for a hand-written writing test. To investigate, a sample of university students was prohibited from using a grammar-checker for a semester. What can the psychologist conclude with α = 0.01? The data are below. id error 8 1 3 4 5 7 11 21 19 15 45...
Suppose that the average number of airline crashes in a country is 2.5 per month. (a) What is the probability that there will be at least 3 accident in the next month? probability = __?__ (b)What is the probability that there will be at least 6 accident in the next two month? probability = __?__ (c) What is the probability that there will be at most 5 accident in the next three month? probability = __?__
7. An urn contains nine blue balls and six yellow balls. If five balls are selected randomly without being replaced probability that of the balls selected, one of them will be blue and four of them will be yellow? (2 points) N-15 n=5 8. The mean number of errors per page made by a member of the word processing pool for a large company is thought 2.6 with the number of errors distributed according to a Poisson distribution. If a...
The average teacher’s salary in Connecticut (ranked first among states) is $58,698. Suppose that the distribution of salaries is normal with a standard deviation of $7,500 a. What is the probability that a randomly selected teacher makes less than $52,000 per year? b. If we sample 100 teachers’ salaries, what is the probability that the sample mean is less than $56,000?
4. + MBasicStat7 12.E.045. My Notes + Ask Your Teacher Spell-checking software catches "nonword errors" that result in a string of letters that is not a word, as when "the" is typed as "teh". When undergraduates are asked to write a 250-word essay (without spell-checking), the number X of nonword errors has the following distribution. Value of x Probability 0 0.05 1 0.15 2 0.29 3 0.25 4 0.26 (a) Is the random variable X discrete or continuous? Why? X...