The heart rate variability (HRV) of police officers was the subject of research published in a biology journal. HRV is defined as the variation in the time intervals between heartbeats. A measure of HRV was obtained for each in a sample of 308police officers from the same city. (The lower the measure of HRV, the more susceptible the officer is to cardiovascular disease.) For the 79 officers diagnosed with hypertension, a 95% confidence interval for the mean HRV was (9.4,129.1).

For the 229 officers that are not hypertensive, a 95% confidence interval for the mean HRV was (145.7,188.6).

Use this information to complete parts a through d below.

a. What confidence coefficient was used to generate the confidence intervals?

b. Give a practical interpretation of both of the 95% confidence intervals. Use the phrase "95% confident" in your answer.

The researchers can be 95% confident that the true mean HRV for all hypertensive police officers in the city is between __ and __. A similar statement can be made about the police officers without hypertension.(Type integers or decimals. Do not round.)

Please kindly check explainations for the answers

Step-by-step explanation:

a) 95% confidence coefficient was used

b) If repeated samples were taken and the 95%confidence interval was computed for each sample,95% of the intervals would contain the population mean

The researchers can be 95% confident that the true mean HRV for all hypertensive police officers in the city is between _9.4_ and 129.1__. A similar statement can be made about the police officers without hypertension.

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation:

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.