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There are 40 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 6 min and a standard deviation of 6 min.
If a grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, the (approximate probability that he is through grading before the 11:00 P.M. TV news begins is probability is
If the sports report begins at 11:10 P.M., the probability that he misses part of the report if he waits until grading is done before turning on the TV is
on a recent prostate cancer screening test bobo received positive results. it is known that this type screening test
Students at a major university are complaining of a serious housing crunch
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
1. an article in the washington post on march 16 1993 stated that nearly 45 percent of all americans have brown eyes. a
The inventory value is estimated by the sum of book values of population and N-D, where N is population size at top ,D at bottom. show that the estimate is unbiased. Find an expression for the variance of the estimate.
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
Information on a packet of seeds claims that the germination rate is 92%, only 171 of 200 test seeds sprout. Is this evidence that the seeds have lost viability during a year in storage?
A year ago, Air Force implemented new test for finding which candidates are most probable to become successful pilots. Now they wish to see if implementing pilot predictor test was a good idea. Scores have been standardized to facilitate comparis..
Find a 98% confidence interval for the true proportion of students who have a personal blog with a maximum margin of error of 0.03. How many students do you survey?
a poll of 1200 randomly selected community college students in the u.s. was conducted and found that 58 favor
A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.
if my question of interest is if cactus needles are smaller the closer they are to a human trail what would be a good
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