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The data values below are the 6-year graduation rate, rounded to the nearest percent, for 9 randomly selected 4-year colleges and universities in the US.
57, 77, 88, 45, 42, 22, 65, 48, 63
What if you made a mistake entering the data, and in place of the final two entries, 48 and 63, you had accidentally entered the single number: 4863? For each of the following summary statistics, decide whether they would stay roughly the same, become much larger, or become much smaller:
a. Mean
b. Median
c. IQR
d. Range
e. Standard deviation
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
A 2009 survey reported in USA TODAY asked U.S. households who cooks in the home on Mother's Day. The results from the survey are reported.
Assume that the class has 60 students and 60 minutes to complete the exams. How many students do you expect not to be able to complete the exam in the alotted time?
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
If 20% of the students entering college drop out before receiving their diplomas, ?nd the probability that out of 20 students picked at random from the very large number of students entering college, less than 3 drop out.
Find the mean score, X , of the data in the frequency distribution above and find the standard deviation of the scores in the frequency distribution above.
In almost every house, this room is heavily used and often needs to be expanded to accommodate personal tastes.
The TV Show "MythBusters" puts a popular myth to the test on each episode. If a myth involves fire, what is the chance that it will be verified as true
calculate the value of the test statistic set up the rejection region determine the p-value interpret the result and
The conclusion was that, on average, each notch down in rating added an approximate 14.6 basis points to the bond's yield. How accurate is this prediction?
Which of them were uncertain because the outcome was not yet determined and which were uncertain because of Alicia's lack of knowledge of the outcome?
Suppose the population standard deviation is s = 5, an SRS of n = 100 is obtained, and the confidence level is chosen to be 98%. The margin of error.
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