Mean or Expected Value and Standard Deviation · Exercise 30
A university has 14 statistics classes scheduled for its Summer 2013 term. One class has space available for 30 students, eight classes have space for 60 students, one class has space for 70 students, and four classes have space for 100 students.
(a) What is the average class size assuming each class is filled to capacity?
(b) Space is available for 980 students. Suppose that each class is filled to capacity and select a statistics student at random. Let the random variable X equal the size of the student’s class. Define the PDF for X.
(c) Find the mean of X.
(d) Find the standard deviation of X.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Statistics · §4.2 Mean or Expected Value and Standard Deviation · Exercise 30
No hints for this one.
Check your full solution
Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.
Your first check today doesn't need an account.
Your photos and PDFs are read once and not stored — only the transcription is kept.