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Last semester, the mean score of the midterm exam for Dr. Ngo's Statistics course is 65 and the standard deviation is 8.2. Mary spent a lot of time studying and received a score of 79. Lisa didn't spend a lot of time studying but received a score of 71 in Dr. Ngo's class.
1) John is taking Dr. Ngo's class this semester. He plans to spend a few hours studying for the test. What is the probability of John receiving a score that is between Mary's and Lisa's scores?
2) What is the probability of John receiving a score that is below Lisa's score?
3) What is the probability of John receiving a score that is above Mary's score?
Comment on the graphical comparison between the estimates obtained with the automatically selected spans in Problem 8 and the estimate obtained from Friedman's smoother using the cross-validation span in Problem 1.
a health care worker wishes to see if the average number of family day care homes per county is greater than the
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a survey of a simple random sample of recent university graduates finds that six months after graduation 75 of the 400
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Calculate the probability that the median of the sample or average medians is:
Convert them into valid standard-form syllogisms. The U.S. surgeon general's latest report on cigarettes and cancer is an interesting example of natural selection in the late twentieth century.
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A sample of 36 scores is selected. What is the probability that the sample mean will be larger than 1224?
Which would be the independent and dependent variable for this question? Degrees of religious belief and self-reported well-being?
Tire will last 50000 miles before it comes bald or fails. adjustment is made on any tire that doesn't last 50000. purchase four tires. what is the probability all four tires will last at least 50000 miles.
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