You are trying to decide whether or not to book a cheap flight to fly home from ncsu after your final exams, but you're not sure when your last exam will be. you think there is a 30% chance that your last exam will be scheduled after the last day that you can get a seat on the cheap flight. if it turns out that your last exam is scheduled after the last day that you can get a seat on the cheap flight, then you will have to cancel the flight, resulting in a loss to you of $150. if you can take the cheap flight home you will save $100. question 1. if you book the cheap flight, what is your expected gain? dollars. question 2. if you book the cheap flight, what is the standard deviation of your gain? dollars.

Expected gain $25

Standard deviation of the gain $134.63

Step-by-step explanation:

Let C, T the events

C = You have to cancel the flight

T = You can take the flight

P(C) = 30% = 0.3 with a “gain” of -$150

P(T) = 70% = 07  with a gain of $100

Expected gain E

E = -150P(C) + 100P(T) = -150*0.3 + 100*0.7 = -45 + 70 =$25

Standard deviation of your gain

d? maybe

step-by-step explanation:

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.