Question

22. Describe how the relationship between x and y changes as ra goes from 0 to 1. (2) 23. A study of sport and compact car colors shows that 15.2% are green, 14.4% are white, 19.8% are red, 11.2% are black, and 39.4% are other colors. When 100 trucks and vans are randomly selected, it is found that 16 are green, 24 are white, 16 are red, none are black, and 44 are other colors. Is there sufficient evidence to support the claim that the color distribution for trucks and vans is different from the color distribution for sport and compact cars? a.05 (16) 24. The nighttime cold medicine Dozenol bears a label indicating the presence of 600 mg of acetaminophen in each fluid Ounce of the drug. The Food and Drug Administration randomly selected 40 one-ounce samples and found that the mean acetaminophen content is 593 mg, whereas the standard deviation is 21 mg. Use a a = 0.01 and test the claim of the Medassist Pharmaceutical Company that the population mean is equal to 600 mg. (11)

Answer 1

Here' the answer to the question. please write back in case you've doubts.

Answering 1st question, as we are allowed to answer 1 question per post.

22.

When r^2 =0 then it means no linear relation exist between the two variables.

When r^2 is slightly more than 0, it means that there is weak linear relation between the two variables.
In other words one is not able to explain the the variation in the second variable.

As r^2 moves towards 1 the linear relation between the two get stronger.

At r^2 =1 a perfect relation exists, where one variable is able to explain the variance in other variable perfectly, and hence can be used as a predictor for the other variable.