Alvin wants to know how much time his friends spend watching television compared to the population in
terms of the number of hours watched during a single week. he collects the data from nine of his friends.
the average time his friends spend watching television in a week is 28 hours, with a standard deviation of 9.
he knows that the population mean is 34. what is the standard error? (answer using two decimal places.)

answer:

my nut > : 3

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.