Use the sample data and confidence level given below to complete parts (a) through (d)
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2625 subjects randomly selected from an online group involved with
ears. 1014 surveys were returned. Construct a 90% confidence interval for the proportion of returned surveys.
a) Find the best point estimate of the population proportion p.
n
(Round to three decimal places as needed.)
b) Identify the value of the margin of error E
EN
(Round to three decimal places as needed)
c) Construct the confidence interval.
D

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3