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Question: Still rockin'. 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?
a company has a piece of equipment that is broken. the company loses 500 a day for each day the equipment remains
in a normal distribution what z-score value separates the highest 40 of the scores from the rest of the
Standard deviation versus standard error. Explain the difference between the standard deviation of a sample and the standard error of a statistic such as the sample mean.
How large a sample would be needed to estimate the true proportion of jets with the wiring problem, with 98 percent confidence and an error of ± 6 percent? (Enter your answer as a whole number (no decimals). Use a z-value taken to three decimal pl..
suppose the research team feels that more than 75 of airline customers will choose seat b as the most comfortable.
Find the proportion of men who died from cardiovascular disease in the high-blood-pressure group. Then calculate the odds.
A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted.
What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
a market research survey is available for 10000. using a decision tree analysis it is found that the expected monetary
in the following data set what percent of observations fall within one standard deviation of the mean?75 76 77 77 77 78
Identify a decision process within your work or business interests that could be resolved based on data.
1.In 2003, the average stock price for companies making up the S&P 500 was $30, and the standard deviation was $8.20 (BusinessWeek, Special Annual Issue, Spring 2003). Assume the stock prices are normally distributed.
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