A doctor wants to estimate the mean HDL cholesterol of all 20-to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 2 points with 99% confidence assuming s= 14.5 based on earlier studies
Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
e Click the icon to view a partial table of critical values.
A 99% confidence level requires 349 subjects. (Round up to the nearest subject.)
A 95% confidence level requires
subjects. (Round up to the nearest subject)

How do you use the elimination method for this question? explain, because i really want to understand!

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project