x probablity             -250 0.07             -100 0.09             0 0.21             75 0.31             150 0.24             275 0.06             400 0.02                                 find the MRA's variance in profit for the first year of operation

Q: Monkeys-R-Us claims that the price variance is higher at the dreaded Monkeys Inc. In a random sample…

A: Given that: Variance at Monkeys Inc., s12=22500 Variance at Monkeys-R-Us, s22=15500 Sample size…

Q: When a constant value of 4 is subtracted from every score, the mean will _______ and the standard…

A: Given: Every score is subtracted by 4.

Q: 3.If somebody invests P15,000 at 7 percent, P20,000 at 10 percent, and P 30,000 at 8 percent, what…

A:

Q: Q3: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

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Q: Using R Suppose the distributions of arrival and service times were normal instead of exponential.…

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Q: The director of research and development testing and new drugs she wants to know if there's evidence…

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Q: The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval…

A: According to the given data, first form the following table:IntervalFrequency(fi)Midpoint(xi…

Q: The mean always has a z-score (value) →

A: When the data is converted into z scores, the mean will always end up being zero.

Q: A man runs 1 mile approximately once per weekend. He records his time over an 18-week period. The…

A: STEP 1: Given, the data on the time taken by a man to run one mile approximately once per week for…

Q: state whether the parameter of interest is a mean or a proportion: a survey reports that local t…

A: The survey reports that local t news has shown a 17% increase in revenue while newspaper revenues…

Q: While doing an experiment, a physics student recorded the following sequence of elapsed times (in…

A: The old data is  2.08 21.8 2.83 2.15 2.64 2.32 2.25 The new data is as follows,…

Q: Annual revenue for Corning Supplies grew by 5.5% in 2010, 1.1% in 2011, -3.5% in 2012, -1.1% in…

A: The annual growth rate represents the percentage of amount which is increased in 1 year. For example…

Q: A tubes lifetime for your company's microwave follow an exponential distribution with a mean of 5.6…

A: Given, Let X be the variable that denotes tube lifetime. The mean of X is 5.6. X ~ Exp (1/5.6)

Q: Measure the significance of the difference in the height of Chris's friend before and now with a…

A:

Q: Monthly maintenance costs are distributed normally with a µ = $250 and σ = $50. Find the range…

A: Let X~N(µ,  σ2), where, µ = 250 and σ = 50. X~N(μ,σ2)⇒Z=X-μσ=X-25050~N(0,1) We need x1, and x2, such…

Q: Coffee: The National Coffee Association reported that 65% of U.S. adults drink coffee daily. A…

A: Given that Sample size n=300 Population  proportion p =0.6

Q: What proportion of the population score above an 18 on the ACT? What proportion of students score…

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Q: Coffee: The National Coffee Association reported that 62% of U.S. adults drink coffee daily. A…

A: Given p=62% n=250

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A: We have to find 60% of the time, the delivery time will fall above  what value ....

Q: Why isn't the average by itself adequate?

A: The measures of center or measures of central tendency are those descriptive measures that give the…

Q: Calculate the incidence rate of prostate cancer in this population A population of 200 healthy men…

A: Total population available = 200 After being followed-up for 5 years, 10 men developed prostate…