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Denzel Washington is "lording" his SAT score over his friend, Will Smith, who took the ACT. "You only got a 30 in math," he chortled, "while I got a 300 in math." Given that the SAT has a μ of 500 and a σ of 100, and the ACT has a μ of 20 and a σ of 5, what is wrong with Denzel Washington's logic (give the answer in both z scores and percentile ranks).
What's the mean of this difference?- What's the standard deviation of this difference?- What's the probability that the man is taller than the woman (that the difference in heights is greater than 0)?
The stock price on the next day can either go up by $10 with probability 40% or go down by $10 with probability 60%. What is the probability that the 2nd day's stock price is $50 given that the 1st day's price is $60?
According to an article in Travel and Leisure, every person in a small study of sleep during vacation was found to sleep longer than average during the first.
Explain what the standard error of the mean represents and does the sampling distribution of x look like a Normal distribution if n is 10?
Use the cumulative distribution to calculate the possibility that he makes more than 5 but less than 9 free throws, P(5
Feeling sleepy? The first four students to arrive for a first-period statistics class were asked how much sleep (to the nearest hour) they got last night.
Very satisfied customers give the XYZ-Box video game system a rating that is at least 42. In the context of this situation, interpret making a Type I error; interpret making a Type II error.
Suppose that the distribution of scores on an exam is closely described by a normal curve with mean 100. The 16th percentile of this distribution is 80.
Let rp be the Pearson product moment correlation coefficient defined in (8.78). Show that rs (8.63) is simply this Pearson product moment correlation coefficient applied to the rank vectors (R1, ... , Rn ) and (S1, ... , Sn ) instead of the original ..
In a recent city meeting, it was agreed that the city was going to build a new town hall. Long-term bonds, intergovernmental transfers, and public donations will be used to construct and maintain the building. The major discussion was how to recor..
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
Identify the part of setting up a simulation in excel that you find to be the most challenging, and explain why.
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