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The letter grades on the midterm exam given in a large managerial statistics class are normally distributed with mean 75 and standard deviation 9. The instructor of this class wants to assign an A grade to the top 10% of the scores, a B grade to the next 10% of the scores, a C grade to the next 10% of the scores, a D grade to the next 10% of the scores and an F grade to all scores below the 60th percentile of this distribution. For each possible letter grade, find the lowest acceptable score.
Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70
Do you think the assumption of independence made above is reasonable?
randomly pick up 5 cards from a deck of 52 cards. find the probability that the third card is red if the first card is
How do we define what the concept of 'nation-state' is? Referring to the development of nation states such as France, Germany in the 17th-18th century.
What information is provided by the numerical value of the Pearson correlation? For the following scores, compute the Pearson correlation:
Suppose a researcher studying health issues measures blood pressure and the percentage of body fat for several adult males and finds a strong positive association. Describe three different possible cause-and-effect relationships that might be prese..
In a plant that makes ball bearings? samples are routinely subjected to a stringent crushing test. A sampling inspection scheme is required
A sample of sizen=10n=10is drawn from a population. The data is shown below.
How many students whould be required to estimate the proportion of students who consume coffee?
What is the probability that there will be exactly 1 item of each grade in a sample of 4 items, selected at random from the output of the machine?
find the minimum sample size that should be chosen to assure that the proportion estimate p will be within the required
A researcher rejects the null hypothesis for a one-way between-subjects ANOVA, where k = 4. What is the next step in the analysis?
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