I need help with a statistics problem

Dec 5th, 2015
Price: $10 USD

Question description

An instructor has found that grades on the final exam for a course are normally distributed with a mean of 63 (out of 100) and a standard deviation of 11.5. The pass mark for the exam is 50.

The exam consists of 24 multiple-choice questions, each with 3 possible answers of which only 1 is correct.

Part 1 - How many students in a typical class of 30 would you expect to fail?

Part 2 - A student knows the answer to 12 of the questions, but has to guess at the other 12. What’s the probability that this student ends up in the top 10% of the class?

Tutor Answer

(Top Tutor) James M847
School: University of Maryland

Studypool has helped 1,244,100 students

Review from student
" Top quality work from this guy! I'll be back! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1823 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors