Need . i just need someone to check my answers
i need this done by the end of the day u will get 50 pts. i suck at math

4. in one study, it was found that the correlation coefficient between two variables is −0.93 .

which statement is true?

there is strong positive association between the variables.

there is a weak positive association between the variables.

> > > > > there is a strong negative association between the variables.

there is a weak negative association between the variables.

6. a study of several cities shows a positive correlation between the percent of people biking to work and the percent of people spending their vacation time at home.

which statement is most likely true?

bike riding makes people want to vacation at home.

vacationing at home makes people want to ride their bike.

> > > > the correlation is due to a third variable: cost of gas.

the correlation is due to a third variable: cost of milk.

7. the regression equation y = 1.3x + 6.8 approximates the number of minutes it takes an employee to drive to work, y, given the number of miles the employee has to drive, x.

which statement is true?

for every extra mile an employee drives, the driving time increases by 6.8 minutes.

> > > > for every extra mile an employee drives, the driving time increases by 1.3 minutes.

for every extra minute an employee drives, the distance increases by 1.3 miles.

for every extra minute an employee drives, the distance increases by 6.8 miles.

8.the regression equation y=−0.414x+106.55 approximates the percent of people in an audience who finish watching a documentary, y, given the length of the film in minutes, x.

which percent is the best prediction for the percent of people in an audience who will finish watching a documentary that is 70 minutes long?

29%

15%

56%

> > > > 78%

9.the correlation coefficient r between the size of a lake in square miles, x, and the yearly number of registered boaters, y, is 0.743.

what percent of the variation in the number of yearly boaters can be explained by differences in lake sizes?

> > > > 55.2%

44.8%

37.2%

74.3%

10. the regression equation y=3.648·1.182x approximates the cost to go on a safari, y, given the number of years since it opened in 2005, x.

which is the best estimate for the cost of a vehicle to drive through the safari in 2013?

$12.44

$7.46

$13.90

> > > > $34.50