Question will be in the picture below, in advance!

Answers are I two options

Step-by-step explanation:

THe question is about the confidence interval of difference of two groups

From the given data we find that mean difference =-25.82

Sample size of group I = 41 and group 2 =36

Hence for difference of means degree of freedom = 41+36-2=75

Since df >30, z critical 99% i.e. 2.58 can be used

Std error for difference =2.280

Hence for 99% confidence interval

margin of error = ±2.58(2.28)

=±5.91

Confidence interval lower bound =-25.82-5.91 =-31.73

Upper bound = -25.82+5.91 =-19.91

From the given five values we find that

24.12 and 26.71 lie within this interval

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.