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Suppose that the weights of airline passenger bags are normally distributed with a mean of 47.56 pounds and a standard deviation of 3.08 pounds.
What is the probability that the weight of a bag will be greater than the maximum allowable weight of 50 pounds? Give your answer to four decimal places.
Let X represent the weight of a randomly selected bag. For what value of c is P(E(X) - c < X < E(X) + c)=0.81? Give your answer to four decimal places.
Assume the weights of individual bags are independent. What is the expected number of bags out of a sample of 20 that weigh greater than 50 lbs? Give your answer to four decimal places.
Assuming the weights of individual bags are independent, what is the probability that 5 or fewer bags weigh greater than 50 pounds in a sample of size 20? Give your answer to four decimal places.
People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7% of the American population have O-negative blood.
the dean would like to get a summary of gender and final grade for this class. discuss the forms of numerical and
A report states that 73% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 0.03 with 98% confidence?
Consider two random variables X and Y. Suppose that the variance of X is 20, that this of Y is 10, and that the covariance of X and Y is 5. What is the variance of the random variable 2X+Y?
The standard deviation of the sample is $3,000. Interpret your findings.
Utilize the given degree of confidence also sample data to construct a confidence interval for population proportion.
A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF
Determine the probability that subscriber didn't rent the car during past 12 months for either business or personal reasons?
a potato chip manufacturer samples 13 bags of potato chips off the assembly line and weighs their contents. if the
The exercise problem the following information to figure prevalence and incidence rate:
History suggests that the average number of hurricanes formed during a year is 6.0 hurricanes. Find the probability of at most three hurricanes being formed during a randomly selected year.
What statistical method is used to accept or reject the null hypothesis in determining if outsourcing is always beneficial? Please explain your reasons for choosing the selected method in detail and cite references (if any).
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