Discussion:
Q: Dr. S wishes to measure the effect of TV viewing on reading scores in elementary school children. The data for the sample are shown here. Assume the population is normal.
# hours TV/week (x): 4,5,8,12,20,16,20,22,22,25,30
Reading scores (y):805,810, 860,750,715,755,720,635,615,540,500
a. Construct a scatter plot using Minitab and describe the relationship between the variables.
b. Find the value of the correlation coefficient. Is the correlation positive or negative? Why?
c. Test the significance of the correlation coefficient at alpha = 0.05.
d. Test the significance of the correlation coefficient at alpha = 0.05.
State the hypotheses;
Ho:
H1:
e. State the p-value and make a decision.
f. Find the equation of the regression line.
g. Predict y when x = 10 hours.