Question

In: Statistics and Probability

An instructor who taught two sections of engineering statistics last term, the first with 25 students...

An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 30, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects.

(b) What is the probability that at least 10 of these are from the second section? (Round your answer to four decimal places.)


(c) What is the probability that at least 10 of these are from the same section? (Round your answer to four decimal places.)


(d) What are the mean value and standard deviation of the number among these 15 that are from the second section? (Round your mean to the nearest whole number and your standard deviation to three decimal places.)

mean projects
standard deviation     projects


(e) What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section? (Round your mean to the nearest whole number and your standard deviation to three decimal places.)

mean projects
standard deviation     projects

Please answer parts B, C, D, and E

Solutions

Expert Solution


Related Solutions

An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 35, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that at least 10 of these...
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 35, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that at least 10 of these...
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 30, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 13 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that exactly 9 of these are...
An instructor who taught two sections of engineering statistics last term (the first with 20 students...
An instructor who taught two sections of engineering statistics last term (the first with 20 students and the second with 30), decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. a. What is the probability that exactly 10 of these are from the second section? b. What is the probability that at least 10 of these are from the second section?
An instructor who taught two sections of MTH132, with 20 and 30 students respectively. The instructor...
An instructor who taught two sections of MTH132, with 20 and 30 students respectively. The instructor randomly select 15 students for a field trip. 1. What is the chance that exactly 10 of them are from the 2nd section? 2. What is the chance that at least 10 of them are from the 2nd section? 3. What is the chance that at least 10 of them are from the same section?
Two sections of a class in statistics were taught by two different methods. Students’ scores on...
Two sections of a class in statistics were taught by two different methods. Students’ scores on a standardized test are shown in Table 5.12 . Do the results present evidence of a difference in the effectiveness of the two methods? (Use α = 0.05.) Class A: 74, 97, 79, 88, 78, 93, 76, 75, 82, 86, 100, 94 Class B: 78, 92, 94, 78, 71, 85, 70, 79, 76, 93, 82, 69, 84 Include R code.
Statistics students believe that the mean score on a first statistics test is 65. The instructor...
Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades 73.5 68.4 65 65 63.9 68.4 64.3 66.5 61.9 69 Test grades are believed to be normally distributed. Use a significance level of 5%. State the standard error of the sample means:  (Round to four decimal places.) State the test statistic: t=t=  (Round to four decimal places.) State the...
...Statistics students believe the mean grade on the first exam is 65. A statistics instructor thinks...
...Statistics students believe the mean grade on the first exam is 65. A statistics instructor thinks the mean grade is higher than 65. He samples ten statistics students and finds their mean grade is 67 with a standard deviation of 3.1972 for the sample. Use the Traditional Method and α = 0.05 to test the instructor’s claim. The data are assumed to be from a normal distribution. ... State the information given: State the claim in words: State the claim...
Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class...
Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class go through life more enriched. For some reason that she can't quite figure out , most people don't believe her. You decide to check this out on your own. You randomly survey 64 of her past Elementary Statistics students and find that 34 feel more enriched as a result of her class. Now , what do you think? (Only using R-Lab)
Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class...
Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class go through life feeling more enriched. For some reason that she can't quite figure out, most people don't believe her. You decide to check this out on your own. You randomly survey 64 of her past Elementary Statistics students and find that 34 feel more enriched as a result of her class. Now, what do you think? Conduct a hypothesis test at the 5%...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT