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Let x be a discrete random variable that possesses a binomial distribution. If n = 5 and p = 0.8, then...
a) What is the mean (round to three decimal places)
b) What is the standard deviation of the probability distribution (round to three decimal places)?
A person makes random guesses for 10 true-false questions on a test. Find the probability that the student answers at least one question correctly.
Ten pairs of points yielded a correlation coefficient y of 0.79. If a=0.05, which of the following statements is correct if H 0:P=0? (Do not calculate a t-value.)
perform hypothesis tests. please label the test statistic you found t value z value or chi square and the value. for
four balls are randomly placed one at a time into four urns so that it is possible for more than one ball to be in any
Describe the shape of the histogram using the standard terminology of histograms. Would you describe per capita income as being fairly homogenous across the United States?
The random variable X is uniformly distributed on (-1, 2) . Derive the pdf of Y = X2.
What is the probability that he finds at least one fake? What is it if the king tests 2 coins from each of 250 boxes?
A local school board wanted to compare test scores on standardized mathematics tests for 9th grade students in 2 different junior high schools. Conduct the correct test of hypothesis
A random sample of 1440 current job applicants results in 61 failures (based loosely on data from the American Management Association).
Calculate the z-test statistic to test the difference in SAT math scores from students in Delaware and New jersey. A sample of 45 students from Delaware had an average score.
Many construction sites post a sign that proclaims the number of days since the last accident that injured an employee.
A survey was conducted to measure the height of men. In the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study particip..
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