The number of users that were logged into an Internet server was monitored every minute, over a period of 100 minutes. Here are the results:
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(a) Group these measurements into 10 equal classes, (81–95, 96–110, etc.) and construct a frequency distribution table for the data. (b) Draw a histogram of the distribution. (c) Find the mean number of users during the sample period. (d) Using the histogram, estimate the probability of 141–165 users being logged in at any given time.
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