Question

Beer and Blood Alcohol Content

The relationship between number of beers consumed (x) and blood alcohol content ( y) was studied in 25 male college students by using simple linear regression. The estimated blood alcohol content ( ŷ ) is given in the following regression equation:

ŷ = -0.0127 + 0.0180x

Suppose that the legal blood alcohol content limit for driving is 0.05. If John consumed 4 beers the model would predict that he would be:

Select one:

a. 0.0027 above the legal limit

b. 0.0347 above the legal limit

c. 0.0093 above the legal limit

d. 0.022 above the legal limit

e. 0.0027 below the legal limit

5.  

A multiple choice test has 12 questions. Each question has 4 choices of which exactly one is correct. If a student makes random guesses for all 12 questions, what is the probability that the student will get exactly 5 questions correct?

Select one:

a. The answer cannot be determined from the given information.

b. 0.2270

c. 0.0584

d. 0.1032

e. 0.0532

6.

A medical doctor knows from past experience that 80% of his patients have private health insurance and 20% do not have private insurance. He also notices that among those who have private health insurance, 65% are over the age of 50 while among those who do not have private health insurance, only 30% are over the age of 50. What is the probability that a randomly selected patient is over 50 years of age and has private health insurance?

Select one:

a. 0.65

b. 0.3

c. 0.52

d. 0.16

e. The answer cannot be determined from the given information.

please provides this question answer quickly. i need it urgently.

Answer 1