Question

In: Statistics and Probability

A teacher gives a test with 17 questions. Students are allowed to choose any thirteen to...

A teacher gives a test with 17 questions. Students are allowed to choose any thirteen to answer. How many different choices of thirteen questions are there?

Solutions

Expert Solution

TOPIC:Permutation and combination.


Related Solutions

An instructor gives an exam with fifteen questions. Students are allowed to choose any eleven to...
An instructor gives an exam with fifteen questions. Students are allowed to choose any eleven to answer. (a) How many different choices of eleven questions are there? (b) Suppose six questions require proof and nine do not. (i) How many groups of eleven questions contain four that require proof and seven that do not? (ii) How many groups of eleven questions contain at least one that requires proof? (iii) How many groups of eleven questions contain at most three that...
An instructor gives an exam with seventeen questions. Students are allowed to choose any twelve to...
An instructor gives an exam with seventeen questions. Students are allowed to choose any twelve to answer. (a) How many different choices of twelve questions are there? (b) Suppose seven questions require proof and ten do not. (i) How many groups of twelve questions contain five that require proof and seven that do not? (ii) How many groups of twelve questions contain at least one that requires proof? (iii) How many groups of twelve questions contain at most three that...
A teacher gives a third grade class of n = 16 a vocabulary test at the...
A teacher gives a third grade class of n = 16 a vocabulary test at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores revealed an average improvement of MD = 5.7 points with s2 = 144. Does this constitute a significant improvement? Use a one tail, related-samples t test with an alpha level of .05. a. Calculate Cohen's D (Round...
A teacher gives a third grade class of n = 16 a vocabulary test at the...
A teacher gives a third grade class of n = 16 a vocabulary test at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores revealed an average improvement of MD = 5.7 points with s2 = 144. Does this constitute a significant improvement? Use a one tail, related-samples t test with an alpha level of .05. find standard error find degrees...
A math department gives all college algebra students a test to test rather or not students...
A math department gives all college algebra students a test to test rather or not students taking college algebra on site perform better on Final than students that take class completely online. The Math department gathers random samples of 40 on-site students (Students who take class in the classroom) and 35 online students. The test score for each student in the random sample is determined. The mean score for the on-site students is 75, with a standard deviation of 12....
Mr. Grade’s was a new teacher whose students loved to chew gum, but it wasn’t allowed...
Mr. Grade’s was a new teacher whose students loved to chew gum, but it wasn’t allowed at school. To motivate his students, Mr. Grade created a classroom procedure that stated that students could chew gum during independent work. His students behaved well during independent work time, and their rate of work completion increased. One day, Mr. Grade was observed by the principal. After the observation, the principal asked Mr. Grade to see her during his planning period. From the following...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. Today (Population 1) Five Years Ago (Population 2) Sample Mean 84 89 Sample Variance 112.5 54 Sample Size 45 36 The 92.50% confidence interval for the difference between the...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. Today Five Years Ago x̄ 82 88 σ2 112.5 54 n 45 36 The 95% confidence interval for the difference between the two population means is a. -3.08 to...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. today (population 1) Five years ago (population 2) sample mean 86 88 sample variance 112.5 54 sample size 45 36 The 92.50% confidence interval for the difference between the...
A teacher gives the following assignment to 200 students: Check the local newspaper every morning for...
A teacher gives the following assignment to 200 students: Check the local newspaper every morning for a week and count how many times the word “gun” is mentioned on the “local news” pages. At the end of the week, the students report their totals. The mean result is 85, with a standard deviation of 8. The distribution of scores is normal. a. How many students would be expected to count fewer than 70 cases? b. How many students would be...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT