Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.
Answer:
PLZ MARK BRAINLIEST THE ANSWER IS 9
Step-by-step explanation:
the MPH is 45 miles per hour, 45 divided by 60=0.75. 0.75x12=9
Answer:
please explain what you mean better
Step-by-step explanation:
Answer:
X = 124
Step-by-step explanation:
-4+x=120
We move all terms to the left:
-4+x-(120)=0
We add all the numbers together, and all the variables
x-124=0
We move all terms containing x to the left, all other terms to the right
x=124