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A law firm has open several positions for professional typists. The number of words per minute (wpm) typed by the group of applicants follows a normal distribution with mean 63 wpm and a standard deviation of 8 wpm.
The law firm will select people who type over 80 wpm. What proportion of the applicants pool would be eligible for selection?
suppose a group of 900 smokers who all wanted to give up smoking were randomly assigned to receive an antidepressant
In a lottery every week, 2,000,000 tickets are sold for $1 apiece. If 4000 of these tickets pay off $30 each, 500 pay off $800 each, one ticket pays
find the z-score corresponding to a score of x23 for each of the following distributions. show the formulas used and
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
Use the given contingency table to (a) find the expected frequencies of each cell in the table, (b) perform a chi-square test for independence, and (c) comment on the relationship between the two variables.
The SAT is required of most students applying for college admission in the United States. This standardized test has gone through many revisions over the years.
Coastal businesses along the Gulf of Mexico from Texas to Florida worry about the threat of hurricanes during the season from June through October.
lay out the design for two between-subjects experiments a an experiment involving an experimental group and a control
N balls labeled 1 through are placed in Box 1 while a Box 2 is initially empty. - Draw a state diagram and find the transition probability matrix for this Markov chain.
If a male soldier and female soldier are paired up what will be the mean and standard deviation for the difference in heights for each possible pair?
A software company is trying to decide whether to produce an upgrade of one of its programs. Customers would have to pay $100 for the upgrade.
If a flight to Denver from Los Angeles was chosen at random, determine the proportion of the time that the cost would be smaller than $164.
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