Arandom sample of 50 suspension helmets used by motorcycle riders and automobile race-car drivers was subjected to an impact test, and some damage was observed on 13 of these helmets. (a) find a 95% confidence interval (ci) on the true proportion of helmets that would show damage from this test. (b) sample size calculation: how large must the sample be if we wish to be at least 95% confident that the error in estimating p is less than 0.04 regardless of the true value of p?

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.