Question 6 (1 point) You own a small storefront retail business and are interested in determining...

Question:

Question 6 (1 point) You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over the course of a month for 10 customers and find that the average dollar amount spent per transaction per customer is $83.652 with a standard deviation of$15.2173. Create a 99% confidence interval for the true average spent for all customers per transaction. 1) (-68.013, 99.291 ) 2) (68.013.99.291) 3) (68.402.98.902) 4) (78.84, 88.464) 5) (80.402, 86.902)
Question 9 (1 point) A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 12 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after-before) was 15.069 mg/dL with a standard deviation of 18.4384 mg/dL. Create a 99% confidence interval for the true average difference in cholesterol levels by the drug. 1) (-1.4623, 31.6003) 2) (-1.1894, 31.3274) 3) (1.4623, 31.6003) 4) (9.7463, 20.3917) 5) (11.9632, 18.1748)

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