ICQ 6 group 1

Which of the following correlation coefficients shows the strongest relationship?

• r=0.92

• r=0.23

• r=0

• r=(-0.98)

The correlation coefficient, r, is always between ___ and ___.

• 0 and 1

• -1 and 1

• -1 and 0

• -infinity to +infinity

The linear regression equation for the data in the image is y = 61.93x - 1.79, where y corresponds to the total distance travelled in miles and x corresponds to the time driven in hours.  According to the equation, the slope can be interpreted as:

• After 0 hours of driving, they travelled 61.93 miles.

• They drove at an average speed of 61.93 miles per hour.

• They drove 61.93 miles in total.

• They drove 61.93 hours in total.

Data was collected on the weight of a male  laboratory rat for the first 25 weeks after its birth. The linear regression equation is y= 40x+100, where x is number of weeks and y is weight in grams. What does the y-intercept mean in context of the problem?

• The predicted weight of the rat in the first year. 

• The predicted weight of the rat at birth. 

• The current weight of the rat. 

• The average increase in the rat's weight. 

What is the slope in the following equation: y= 6 - 2/3x?

• 2/3

• -2/3

• 6

• -6

If a researcher's alpha(level of statistical significance) = .05 and the regression results tell us that p = .06, what should the researcher do?

• Reject the Null Hypothesis

• Accept the Null Hypothesis

• Would have insufficient evidence to reject the Null Hypothesis

• Would have insufficient evidence to reject the Alternative Hypothesis