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Finding the probability of each event in a group of events of different possibility
The following table summarizes a survey involving the relationship between living arrangements and grade point average for a group of students.
On Campus
At Home
Apartment
Totals
Below 2.5
98
40
44
182
2.5 to 3.5
64
25
20
109
Above 3.5
17
4
8
29
179
69
72
320
If a student is selected at random, what is the probability that:
a. The student lives on campus?
b. The student has a grade point average below 2.5?
c. The student lives on campus and has a grade point average below 2.5?
Develop a 99% confidence interval for the population proportion.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Determine regression equation. Use assets as independent variables. For fund with $400.0 million in sales, determineut five-year rate of return (in percent).
How many dissimilar computer passwords are possible?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
The researcher found that Lincoln's educational score did not correlate with the expected variables.
Decision rule which chooses alternative associated with smallest maximum opportunity loss is?
Scores on the Math Achievement Test form a normal distribution with a mean of u = 300 and a standard deviation of a = 100. What score separates the top 10% of the distribution from the rest.
Compute the range and interquartile range
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