Aresearcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment. if all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find (a) a sample mean difference near zero(b) a t statistic near zero(c) the variance of the difference scores is near zero(d) none of the other options is correct.

c. 65°

step-by-step explanation:

we are given a triangle with two known angles, 62° and 53°, while the third angle x is unknown and we are to find its value.

we know that the sum of angles in a triangle is equal to a total of 180 degrees. so we can write it as:

x + 62° + 53° = 180°

solving to find the value of x:

x = 180 - (62 + 53) = 65°

therefore, the value of x in this triangle is 65°.

it would be 6xy and -16xy.

answer: idk

step-by-step explanation:

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.