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.)

also share the explanation of how do you get the answer for the blank.

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

(c) compare the results of parts (a) and (b). in general, how do you think the mode, median, and mean are affected when each data value in a set is multiplied by the same constant? multiplying each data value by the same constant c results in the mode, median, and mean increasing by a factor of c. multiplying each data value by the same constant c results in the mode, median, and mean remaining the same. multiplying each data value by the same constant c results in the mode, median, and mean decreasing by a factor of c. there is no distinct pattern when each data value is multiplied by the same constant. (d) suppose you have information about average heights of a random sample of airline passengers. the mode is 65 inches, the median is 72 inches, and the mean is 65 inches. to convert the data into centimeters, multiply each data value by 2.54. what are the values of the mode, median, and mean in centimeters? (enter your answers to two decimal places.) mode cm median cm mean cm in this problem, we explore the effect on the mean, median, and mode of multiplying each data value by the same number. consider the following data set 7, 7, 8, 11, 15. (a) compute the mode, median, and mean. (enter your answers to one (1) decimal places.) mean value = median = mode = (b) multiply 3 to each of the data values. compute the mode, median, and mean. (enter your answers to one (1) decimal places.) mean value = median = mode = --

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle