Psychology statistics question ~*~*?
4. Your Professor is sometimes a very cranky professor and apparently her crankiness is random. Fearing this, you observe her for 22 days (total probability) and she is cranky for 9 of those days.
a) What is the probability that she will be cranky today?
b) What is the probability that she will not be cranky today?
c) What is the probability she will be cranky this Wednesday and next Wednesday?
d) What is the probability she will not be cranky this Wednesday but will cranky next Wednesday?
e) What is the probability she will be cranky today or tomorrow?
Annabelle said,
Wrote on September 16, 2010 @ 7:21 am
A) 9/12
B) (12-9)/12
C) (9/12)(1/7)^2
D) ((9/12)(1/7))((3/12)(1/7)
E) (3/12)(1/7)
Then convert the answers into percentages, if that’s what it requires.