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A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of students:
Major
Gender
Accounting
Management
Finance
Total
Male
100
150
50
300
Female
200
-----
500
a. What is the probability of selecting a female student?
b. What is the probability of selecting finance or accounting major?
c. What is the probably of selecting a female or an accounting major? Which rule of addition did you apply?
d. Are gender and major independent? Why?
e. What is the probably of selecting an accounting major, given the person in a male?
f. Suppose two students are selected randomly to attend a lunch with the president of the university. What is the probability of selecting an accounting major, given that the person selected is a male?
Random samples of 25 observations were selected from each of 3 populations. For these data, SSTR= 120 and SSE = 216.
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
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A bag contains 5 blue balls and 8 purple balls. If 3 balls are chosen randomly and without replacement, form the bag. Let x be the number of blue balls obtained. Then x has a distribution.
Calculate the population mean and population standard deviation.
He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
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Findout the 98% confidence interval for true mean. Findout a 98% confidence interval for the cigarette tax in all 50 states.
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