Answer:
addition
Step-by-step explanation:
idkthis sounds dumb
Answer:
10
Step-by-step explanation:
712.9 / 10 = 71.29
Answer:

Step-by-step explanation:
H0: µ1 – µ2 = 0
HA: µ1 – µ2 ≠ 0
We have given,
The population variances are not known and cannot be assumed equal.
The test statistic for the test is

Where,
= sample meaan of population 1
= sample mean of population 2
= sample size of population 1
= sample size of population 2
Therefore, this is the test

A. 30 degrees
We just rotated the figure but we didn't change the angles!