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At a state political rally, a spaker announced "we should raise test scores so that the students are above the state median". How would you analyze this statement?
Calculate the population mean and population standard deviation.
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
The sample mean of the accounts is found to be y-bar = $94.22, and the sample variance is equal to $455.21. Estimate mu and place a bound on the error of estimation.
How do question content and wording, response strategy, and preliminary analysis planning affect question construction?
Expand the above table to show the change in Ms A's investment portfolio over the year, and construct a suitable diagram to illustrate that information.
Office Visits what is the age distribution of patients who make office visits to a doctor or nurse?
The probability that student pilot passes the written test for a private pilot's license is 0.7. Find the probability that the student will pass the test: (a) on the third attempt (b) before the fourth attempt.
Is there evidence that the change was successful in reducing the wait time? (use 0.05 level of significance)
What statistical procedure was used to analyze data in study B?
Ball bearings are manufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball bearings are more than 5.03 mm?
A particular bulb is turned on once each evening for an average of 10 hr. If it is desired to have a reliability of 90 percent, what is its design life in days?
At the 0.01 level of significance, is there evidence to support the professor's claim?
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