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What is the probability of obtaining two tails in a row when flipping a coin?
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test. Would it be reasonable.
A sample of 81 account balances of a credit company showed an average balance of $1,200 with a sample standard deviation of $126. You want to determine if the mean of all account balances is significantly different from $1,250. Use a .05 level of ..
Binomial distribution for large values of the number of trials, n. Suppose that Y has a binomial distribution with n trials and probability of success on any one trial denoted by p. How we can obtain P (Y B)?
according to an airline a particular flight is on time 95 of the time suppose 120 flights are randomly selected
An election poll reported that a candidate had an approval rating of 34% with a margin of error E of 2%. Construct a confidence interval for the proportion of adults who approve of the candidate.
let x denote the number of heads obtained when a fair coin is tossed 4 times.a what is ex and varx?b repeat 10 times
The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
Sample of 1500 voters was taken and the number who are voting yes is recorded. What is the probability that more than 50% of those 1500 vote yes?
late payment of medical claims can add to the cost of health care. an article reported that the mean time from the date
jenco tracks their daily profits and has found that the distribution of profits is approximately normal with a mean of
Demostate the use of appropriate tools for converting data into meaningful information and select, defend and use appropriate statistical tools for analysis of data and interpretation.
mr. smith was admitted to the hospital for surgery on his left knee. when mr. smith woke up from the anesthesia he
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