Salmon weights: assume that the weights of spawning chinook salmon in the columbia river are normally distributed. you randomly catch and weigh 17 such salmon. the mean weight from your sample is 19.2pounds with a standard deviation of 4.4 pounds. you want to construct a 90% confidence interval for the mean weight of all spawning chinook salmon in the columbia river.

(a) what is the point estimate for the mean weight of all spawning chinook salmon in the columbia river?
pounds

(b) construct the 90% confidence interval for the mean weight of all spawning chinook salmon in the columbia river. round your answers to 1 decimal place.
< ? <

b

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.

191 students play sports and ninety-seven 10th graders were surveyed.

step-by-step explanation: