1. A survey of 200 students is taken.using tips learned in ECON2210 Statistics, It was found that 50% were studying Accounting, 30% Economics, and the rest were studying Statistics.
It was also found that 51% were male. Among the male students, 35% were in Accounting, 40% were in Economics, and the rest were in Statistics.
b. What is the probability of randomly selected student who is found to be a Statistics major, being female?
c. What is the probability that a student is male or studying Economics?
d. What is the probability that a student is studying Accounting if she is known to be female?
What is Statistics?
In common usage people think of statistics as numerical data—the unemployment rate last month, total government expenditure last year, the number of impaired drivers charged during the recent holiday season, the crimerates of cities, and so forth.
Although there is nothing wrong with viewing
statistics in this way, we are going to take a deeper approach.
We will view statistics the way professional statisticians view it—as a methodology for
collecting, classifying, summarizing, organizing, presenting, analyzing and
interpreting numerical information.