Answer Happy

To estimate the "average" temperature in a city (in degrees F), you measure the temperature at a random sample of spots in the city. These values are shown in the table. 4 66.9 72.7 69.6 68 69.7 65 68.3 66.1 69.6 69.7 Build a 95% CI for the mean temperature in the city. You may assume that temperatures follow a normal distribution. Keep at least 3 decimals in all intermediate steps, and round your answer to two decimals. Enter your CI like this: (min, max) Be sure to use the parentheses or you will be marked wrong. Submit Question
A random sample of the price (in $) of a hamburger at 33 restaurants in ACME City found: $8.34, s = $1.35. Build a 95% CI for the population mean price of a hamburger in ACME City. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). 14 Do not include the $ sign. Be sure to use parentheses or you will be marked wrong. Note: if you use a built-in CI command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. a. Since n ≥ 30, We use s, not o We use a Z-interval We use a T-interval O It is not important that hamburger prices be normally distributed b. The Cl is: