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Technology on campus. Every 5 years the Conference Board of the Mathematical Sciences surveys college math departments. In 2000 the board reported that 51% of all undergraduates taking Calculus I were in classes that used graphing calculators and 31% were in classes that used computer assignments. Suppose that 16% used both calculators and computers.
a) What percent used neither kind of technology?
b) What percent used calculators but not computers?
c) What percent of the calculator users had computer assignments?
d) Based on this survey, do calculator and computer use appear to be independent events? Explain.
Calculate the mean, median, mode, variance, and standard deviation for the numeric data and construct a histogram, pie, or Stem-Leaf Display chart encompassing the mean leadership scores for both male and female managers.
Assume the underlying distribution is approximately normal. Find the 98% confidence interval for the population mean.
Random digits. We know that the proportion of 0s among a large set of random digits is p = 0.1 because all 10 possible digits are equally probable.
A shipping form keeps 2 cars in readiness for local delivery. Because of demands on their time and the frequency of mechanical failure, the probability that a particular car will be available when needed is 0.9.
the time to failure of flourescent lights in a large office building is exponentially distributed with a failure rate
A political telephone survey of 260 people asked whether they were in favor or not in favor of a proposed law. Each person was identified as Republican or Democrat. The following contingency table shows the results.
when circuit boards used in the manufacture of compact disc players are tested the long-run percentage of defectives is
explain the difference between qualitative quantitative discrete and continuous
mallory has discovered that the amount of time it takes for a dollar bill to turnaround is distributed n1981 in weeks.
What is the probability that at least 40 of the firefighters will be volunteers in both groups
the probability that a person in the united states has type o blood is 40. three unrelated americans are selected at
Management further believes that the probabilities of favorable, neutral, and unfavorable political situations are 0.6, 0.2, and 0.2, respectively.
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