A Chocofrance

The manager of Chocofrance wants to use its German subsidiary to launch a new line of products. The marketing research results confirm the existence of two different markets, denoted A and B, that cannot be simultaneously targeted by the company.

An estimation of the possible profits and their probability, is presented below:

Market A	Market B
Profit (millions of Euros)	Probability	Profit (millions of Euros)	Probability
1	0.01	1	0.2
2	0.03	2	0.23
3	0.70	3	0.22
4	0.25	4	0.18
5	0.01	5	0.17

For each market, compute the expected value of the profit and the standard deviation. Using both measures (expected value and standard deviation) what market would you recommend to the manager? Explain exactly why.

B- YesorNo?

In a quantitative study, a sample of 200 persons have been asked various questions. 50 persons of the sample answered "Yes" to the second question.

- What is the proportion of individuals in the sample that answered "yes" to this question?

- Construct a 90% confidence interval for the proportion of individuals that would answer "yes" to the same 1585 question, in the entire population of the study.