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Question: Wang's Concrete Service notes that the number of jobs each month follows the following distribution: 10 with probability 0.15, 11 with probability 0.20, 12 with probability 0.20, 13 with probability 0.20, 14 with probability 0.15, and 15 with probability 0.10. The probability that a specific job will be for a residential driveway is 70%, and the probability that it will be for a commercial project is 30%. Revenues for residential driveways follow a normal distribution, with a mean of $500 and a standard deviation of $50. Commercial projects, although more lucrative, also have larger variability. Wang estimates that revenues here follow a normal distribution, with a mean of $1,500 and a standard deviation of $400. Set up a simulation model for Wang's problem and replicate it N times to calculate the average monthly revenue.
If J&B reduces the calendar price to $1 at the end of July and can sell all surplus calendars at this price, how many calendars should be ordered?
jinbao produces tubas and ships them in lots of twenty. suppose that 60 of all such lots contain no defective tubas 30
A pizza restaurant manager claims that the average home delivery time for their pizza is no more than 20 minutes.
The following table gives the median incomes of families by level of income and geographical region.
in testing the difference between the means of two normally distributed populations using large independent random
Answer these three questions and show all your work and use the z-table that is in the back of all statistic book 1) Suppose you know that adult female height is normally distributed and the mean is 65 inches with a std dev of 1.2 inches. What is th..
Create a five-number summary.- Draw a boxplot.- Draw your choice of a histogram, stem-and-leaf plot, or dotplot.
Suppose the daily amount of solar radiation in Los Angeles is normally distribution with mean 450 calories and standard deviation 50. Determine the probability that for a randomly chosen day, the amount of solar radiation is between 350 and 550.
the average salary of a male full professor at a public four-year institution offering classes at the doctoral level is
About what percent of x values lie between the first and third standard deviations(both sides)?
A teacher tells three boys, Drew, Chris, and Jason, that two of them will have to stay after school to help her clean erasers and that one of them will be able.
Imagine there are exactly m opportunities to cross safely by the time the nth shock occurs. What is the probability that the mth opportunity is a close call (that it occurs immediately before the nth shock).
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