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According to her doctor, Mrs. Brown's cholesterol level is higher than only of the females aged and over. The cholesterol levels among females aged and over are approximately normally distributed with a mean of mg/dL and a standard deviation of mg/dL. What is Mrs. Brown's cholesterol level? Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
A supermarket advertises that the waiting time spend by customers waiting in line at the cash register is uniform between 0 and 6 minutes.
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain. (B) How could your answer to part (A) change if you knew returns followed a skewed distribution inst..
Assuming that X is a normal R.V. with mean 1000 and variance 2500, find the probability that a resistor picked at random will be rejected.
Do you think the Poisson distribution, which assumes independent arrivals, is a good estimation of arrival rates in the following queuing systems? Defend your position in each case.
Give the 90% confidence interval for the mean score in the population of all young women.
a) Specify the null and alternate hypotheses for testing that the population correlation is negative. b) Calculate the estimate of the population correlation coefficient between X and Y.
The probability that more than 6 planes arrive in the next minute is _____.
Find the probability that the toll collector will have to wait longer than 26.30 minutes before collecting the 8th toll.
Determine the test criteria that would be used to test Ho: u 1.0 with n=18 and significance level of 0.01 using the classical approach.
Is a body temperature of 99.00F unusual? Why or Why not? d)fifty adults are randomly selected. What is the likelihood that the mean of their body temperatures is 97.98F or lower?
The mean and median selling price of existing single-family homes sold in October 2005 were $216,200 and $265,000. Which of the following most accurately explains which is the mean and which is the median and why?
An EMT Service keeps records of emergency calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls as follows.
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