Arecent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. there were 2676 men with low blood pressure and 3338 men with high blood pressure. in the low-blood-pressure group, 21 men died from cardiovascular disease; in the high-blood-pressure group, 55 died.
a. compute the 95% confidence interval for the difference in proportions.
b. do the study data confirm that death rates are higher among men with high blood pressure? state hypotheses, carry out a significance test, and give your conclusions.

What is the product of the radical expression. (7-2square root) (8+2 square root)

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?