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# Thank You. In 1993, researchers investigated the effect of weed-killing herbicides on house pets.

a) Compute the test statistic.

t= _______ (Round to two decimal places as needed.)

b) Find the P-value. _____ (Round to three decimal places as needed.)

5. Men diagnosed with cancer were randomly assigned to either undergo surgery or not. Among the 349 men who had the surgery, 17 eventually died of cancer, compared with 28 of the 345 men who did not have surgery.

a) Let p̂1 be the sample proportion of men who did not have surgery and died, and let p̂2 be the sample proportion of men who had surgery and died. Create a 95% confidence interval for the difference in rates of death for the two groups of men p̂1-p̂2.

(____ , _____) (Round to three decimal places as needed.)

1. In 1993, researchers investigated the effect of weed-killing herbicides on house pets. They examined 832 cats from homes where herbicides were used regularly, diagnosing malignantlymphoma in...