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The Michigan Department of Transportation (M-DOT) is working on a major project: 80% of the highways in Michigan need to be repaved. To speed completion of this project, many contractors will be working for M-DOT. Contractors are currently bidding on the next part of the project. To help make a decision about which contractor to hire, M-DOT collects many variables other than just the estimated cost. One of those variables is the contractor's estimate of the number of workdays required to finish the job. Twenty contractors have bid on the next job. The boxplot below represents their estimates of the number of work days required.
What is (approximately) the interquartile range, based on the boxplot?
Produce a frequency distribution for these data. Convert the frequency distribution into a probability distribution using the relative frequency assessment method.
the best leadership theories to describe and explain effective leadership in teams with interactive members
problem 1ab21383332405637582245254639572849344325412755a marketing specialist is assessing the effectiveness of two
Suppose two random variables X and Y are both zero mean and unit variance.- Determine under what conditions on the constants a, b, c and d the random variables W and Z are uncorrelated.
the intelligence quotient iq test scores are normally distributed with a mean of 100 and a standard deviation of 15.
1. A medical laboratory receives 30 blood specimens to check for HIV. Ten actually contain HIV. A worker is accidentally exposed to five specimens. What is the probability that none contained HIV?
The actual proportion of doctors is less than 90%, a random sample of 100 doctors resulted in 85 who recommended brand Z. The test statistic is approximately?
Suppose the returns of a particular group of mutual funds are normally distributed with a mean of 12.4% and a standard deviation of 4.7%. If the manager of particular fund wants his fund to be in the top 5% of funds with the highest return, what ..
the following are the hours of operation to failure of 38 light bulbs.150 389 345 310 20 310 175 376 334 340 332 331
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
What are the most common reasons you would select a non-parametric test over the parametric alternative?
it has been stated that 62 of americans drink beer wine or hard liquor at least occasionally. a study was later
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