Question

In: Statistics and Probability

In a survey of 100 NAU students, the following information was obtained:                45 students had taken...

In a survey of 100 NAU students, the following information was obtained:

               45 students had taken an accounting class

               40 students had taken an economics class

               29 students had taken a marketing class

               15 students had taken both accounting and economics classes

               14 students had taken both economics and marketing classes

               22 students had taken both accounting and marketing classes

               12 students had taken all three classes

1. How many students took accounting and marketing classes, but not an economics class?

2. How many students did not take any of the classes?

3. What is the probability that a randomly chosen student took all three classes?

Solutions

Expert Solution


Related Solutions

the students answered a survey and the following information was obtained. •70% of students regularly attended...
the students answered a survey and the following information was obtained. •70% of students regularly attended the classes. •85% of students who attended the classes passed .•40% of students who didn’t attend the classes failed. Alice, a random students from that class, has passed this course. What is the probability that she has attended the classes?
A survey of 280 SPC students was taken at registration. Of those surveyed: 62 students had...
A survey of 280 SPC students was taken at registration. Of those surveyed: 62 students had signed up for a Math course 54 students had signed up for a Language Arts course 32 students had signed up for a Humanities course 23 students had signed up for both a Math and Language Arts course 9 students had signed up for both a Math and Humanities course 10 students had signed up for both a Language Arts and Humanities course 3...
In a survey of MBA students, the following data were obtained on “students’ first reason for...
In a survey of MBA students, the following data were obtained on “students’ first reason for application to the school in which they matriculated.” Reason for Application School School cost or Quality Convenience Other Totals Enrollment Status Full Time 421 393 76 890 Part Time 400 593 46 1039 Totals 821 986 122 1929 (a) Develop a joint probability table for these data. (b) Use the marginal probabilities of school quality, school cost or convenience, and other to comment on...
In a recent survey of 45 apartment residents, 28 had phone answering machines. In a survey...
In a recent survey of 45 apartment residents, 28 had phone answering machines. In a survey of 55 homeowners, 20 had phone answering machines. Can it be concluded that there is no difference in proportions of people who have phone answering machines in the two groups? Use α = .05. What is the null hypothesis? What is the alternative hypothesis? The claim is the null hypothesis. True or False? This test is: Right- tailed, left- tailed, or two- tailed? What...
In a survey taken in 2019, 20 out of 50 women and 17 out of 45...
In a survey taken in 2019, 20 out of 50 women and 17 out of 45 men said they felt that our country was headed in the wrong direction regarding universal healthcare. Do these data provide sufficient evidence at the 0.01 level of significance to conclude that the proportions of women and men that feel our country is headed in the wrong direction regarding healthcare are equal? Use the P-Value Method of Testing. In your work space below, you will...
You are given the following information obtained from a sample of 5 observations taken from a...
You are given the following information obtained from a sample of 5 observations taken from a population that has a normal distribution. 76 67 83 61 63 Develop a 98% confidence interval estimate for the mean of the population.
In a recent survey of county high school students, 100 males and 100 females, 66 of...
In a recent survey of county high school students, 100 males and 100 females, 66 of the male students and 47 of the female students sampled admitted that they consumed alcohol on a regular basis. Find a 90% confidence interval for the difference between the proportion of male and female students that consume alcohol on a regular basis. Can you draw any conclusions from the confidence interval? For the test of significance questions, clearly indicate each of the formal steps...
A sample of 20 students who had recently taken elementary statistics yielded the following informatin on...
A sample of 20 students who had recently taken elementary statistics yielded the following informatin on brand of calculator owned (T = Texas instruments, H = Hewlett Packard, C = Casio, S = Sharp): C S T C C S T T S C C T T T H H S S C Ha. Estimate the true proportion of all such students who own a Texas Instruments calculator.b. Of the 6 students who owned a TI calculator, 2 had graphing...
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of...
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of the 500 students surveyed, 159 like Snickers, 151 like Twix, 176 like Reese's Peanut Butter Cups, 90 like Snickers and Twix, 99 like Twix and Reese's Peanut Butter Cups, 108 like Snickers and Reese's Peanut Butter Cups, and 56 like all three kinds of chocolate candy. How many students like no more than one kind of these chocolate candies? a) 255 b) 315 c)...
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of...
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of the 500 students surveyed, 129 like Snickers, 118 like Twix, 145 like Reese's Peanut Butter Cups, 22 like Snickers and Twix, 54 like Twix and Reese's Peanut Butter Cups, 55 like Snickers and Reese's Peanut Butter Cups, and 8 like all three kinds of chocolate candy. How many students like Snickers, but not Twix or Reese's Peanut Butter Cups? a) 129 b) 69 c)...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT