The following table gives information on ages cholesterol levels for a random sample of 10 men ?
|
Age
|
58 69 43 39 63 52 47 31 74 36
|
|
cholesterol
|
189 235 193 177 154 191 213
165 198 181
|
A. Taking age as an independent variable and cholesterol level as a dependent variable compute . .
B. Find the regression of cholesterol level on age
c. Briefly explain the meaning of the values of a and b calculated in part b
d. calculate r and and explain what they mean
e. plot the scatter diagram and the regression line
f. predict the cholesterol level of a 60-year-old man
g. compute the standard deviation of errors
h. construct a 95% confidence interval for B
i. test at the 5% significance level if B is positive
j. Using a = 025. Can you conclude that the linear correlation coefficient is positive ?