Adoctor 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 4 points with 99 % confidence assuming s equals 12.2 based on earlier studies? suppose the doctor would be content with 90 % confidence. how does the decrease in confidence affect the sample size required?
click the icon to view a partial table of critical values.
a 99% confidence level requires
nothing subjects. (round up to the nearest subject.)

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Determine if the equation defines y as a function of x: 2xy = 1. yes o no