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Crowd Management Strategies monitors accidents at rock concerts. In their database, they list the names and other variables of victims whose deaths were attributed to "crowd crush" at rock concerts. Here are the histogram and boxplot of the victims ages for data from 1999 to 2000:
a) What features of the distribution can you see in both the histogram and the boxplot?
b) What features of the distribution can you see in the histogram that you could not see in the boxplot?
c) What summary statistic would you choose to summarize the center of this distribution? Why?
d) What summary statistic would you choose to summarize the spread of this distribution? Why?
One of these has a history of selling an average of 200 items, with a standard deviation of 20. If he wants to maximize his profits, how many should he order?
Also, Y1 Y2, . . . , Yn , representing yields for corn variety B, constitute a random sample from a normal distribution with mean μ2 and variance σ2. If the X's and Y 's are independent, find the MLE for the common variance σ2. Assume that μ1 and ..
The probability that D1 operates correctly is 0.95 and the probability that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.
Canceled on the day of the flight is (1.2%,4.5%). What is the point estimate of the mean percentage of reservations canceled on the day of the flight?
question you notice at the gym that it appears more women tend to work out together whereas more men tend to work out
historically 1.3 of division 1 football starting players get pro contracts.a of the 72 senior starting players in a
For the telephone switch of Example 10.28, we can estimate the expected number of calls in the system, E[M(t)], after T minutes using the time average estimate
Tthe amount is approximately normally distributed with a mean of 16 and a standard deviation of 1.5. What percent of the cups will have 15 oz or fewer?
the time in minutes between telephone calls at an insurance claims office has the expo- nential probability
Consider a level α = .10 test of H0 (8.1) versus the alternative τ > 0 based on K. How many bivariate observations (n) will we need to collect in order to have approximate power at least .95 against an alternative for which τ = .6?
Obtain monthly balance-of-trade data for the last 24 months between the United States and the United Kingdom or a country specified by your professor. eate an electronic spreadsheet in which the first column is the month of concern, and the second..
If the half-life of a given substance is 60 days, how long will it take for a 30 gram sample of the substance to decay until there is only 7.5 grams of the radioactive material remaining?
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