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The probability that a certain kind of scratch-off lottery ticket will win a prize is 0.22. Kendra received 8 tickets for her birthday, what is the probability at least one of the tickets is a winner?
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A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
Population blood pressure (BP) of patients is normally distributed, with a mean of 127, and standard deviation of 8. A random sample of 49 patients in the hospital found an average BP of 125.
a competency test has scores with a mean of 69 and a standard deviation of 4. a histogram of the data shows that the
zingos grocery store claims that customers spend an average of five minutes waiting for service at the stores deli
a random sample of n 16 scores is obtained from a population with a mean of micro 80 assume ? is unknown and a
Assume that a simple random sample is selected from a normally distributed population, use eith the P-value method or the tradiitonal method of testing hypotheses.
hypothesis testing of single mean.a recent article in the wall street journal reported that the 30-year mortgage rate
The researcher would like to create another regression model and use data from people who are currently students - In simple Ordinary Least Squares regression, the fitted line must always go through a particular point, which is found from the x and ..
in a study conducted by a local university it was found that 25 of college freshmen support increased military
1. a matched pairs experiment compares the taste of instant versus fresh-brewed coffee. each subject tastes two
a couple wishes to borrow money using the equity in their home for collateral. a loan company will loan them up to 70
ssume that these distributions are distributed as normal random variables with the means and standard deviations given previously. Find the probability that the return for common stocks will be greater than 8%.
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