Q7: Please complete Parts A-C. Round answer as needed.

In 1995, researchers investigated the effect of weed-killing herbicides on house pets. They examined 81? cats from homes where herbicides were used regularly, diagnosing malignant lymphoma in 418 of them. Of the 128 cats from homes where no herbicides were used, only 15 were found to have lymphoma. a) What is the standard error of the difference in the two proportions? b) Create a 90% condence interval for this difference. 0) State an appropriate conclusion. a) Let 61 be the sample proportion of cats with lymphoma from homes where herbicides were used regularly and 52 be the sample proportion of cats with lymphoma from homes where no herbicides were used. The standard error of the difference in the two proportions SE61 62): (Round to four decimal places as needed.) b) Create a 90% condence interval for the difference between the two proportions, p1 p2. ( . (Round to three decimal places as needed.) c) Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) A. There is 90% confidence that the lymphoma rate of cats is greater in homes where herbicides are used is greater by an amount from to O B. There is 90% confidence that the lymphoma rate in samples of cats from homes where herbicides are used will be greater by an amount from to O C. There is 90% confidence that the lymphoma rate of pets is greater in homes where herbicides are used is greater by an amount from to