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The number of shark attacks per year in the US is distributed approximately normal, with a Variance of 31.8 and a standard deviation of 10.
A) Determine the number of shark attacks per year that separate the top 2% from the bottom 98 %
B) Determine the number of shark attacks per year that constitute the middle 80% of shark attacks per year.
The daily numbers of calls received by the Internal Revenue Service office in July are shown below:
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Describe your re..
Find the expected value of the number of tests taken.
She knows that 60% of the minerals have mass less than a certain amount m, and needs to select a random sample of n = 16 specimens for an experiment. With what probability will their average mass be less than the same amount m? (Hint: Calculate th..
The project requires you forecast the historical data, replicating the appropriate trends, seasonalities, week-over-week variability, etc. Please refer to the chapter and materials on Forecasting for the procedures to do.
Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.
For a population containing N=902 individuals, what code number would you assign for:
What is the probability that at least three students choose Supreme Chocolate?
Construct the 95 percent confidence interval for the difference between the two population means.
Determine the following:Mean, Median and Variance.
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