Estimate which if the following would be a 15% tip for a bill of $41.50. A) $6.59

B) $5.42

C) $6.23

D) $47.73

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?