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An airline knows that the mean weight of all pieces of passengers' luggage is 49.3 lb with a standard deviation of 8.4 lb. What is the probability that the weight of 66 bags in a cargo hold is more than the plane's total weight capacity of 3,500 lb?
given independent random variables with the means and standard deviations below find the mean and standard deviation of
To give 98% confidence interval for population mean μ, you would use critical value.
How many patients are represented in these data?____
SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank..
Testing for population mean - What happens as you use different levels of significance? Different values of the standard deviation?
tudent from the high school is arbitarily selected. Reply the following questions: Determine the probability that the student's ACT score is less than 22?
When 297 college students are randomly selected and surveyed, it is found that 126 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.
the number of people living in a hypothetical large canadian city is reported by age groups in the following table.age
Two fair six-sided dice are tossed independently. Let X be value of first die, and Y value of second. Find out the expectations of following random variables.
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
if a white-collar worker is chosen at random from this group, what is the probability that he or she prefers light beer (to reg. beer or none at all)?
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
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