1. The equation of the regression line used in statistics is

a)

b)

c)

d) none of the above

2. The coefficient of determination is

a)

b)

c) a

d) b

3. Test independence must be used with

a) one qualitative variable

b) Two qualitative variable

c) one quantitative variable

d) none of the above

4. Contingency table used usually in

a) Test independence

b) One way table

c) Regression

d) None of the above

5. We use ANOVA for _____ samples

a) Two

b) Three and more

c) More than three

d) only ten

Question 2: A study was done to see if there is a different between the salary of man of woman in telecom companies in the UK. A random sample of 100 man (first group) found that the mean of the salary $13,000. The standard deviation of this sample was $500. While the sample of 80 woman (second group) found that the mean was $12,500 and a standard deviation of $345. At , can it be concluded if woman have a less mean salary than men. (show ALL your work) (2.5 points)