35
this is the correct answer if you're on usatestprep
Answer:
I think it's 300
Step-by-step explanation:
Answer:
It will travel
in 45 minutes.
Step-by-step explanation:
We can solve using proportions.
Answer:
Use the normal distribution if the population standard deviation is known.
Use the student's t distribution when the population standard deviation is unknown.
Explanation:
A mound-shaped distribution refers to the normal distribution.
A good sample size for testing against the normal distribution should be
n >= 30.
The condition for the sample size is satisfied.
However, we are not given the population standard deviation, therefore it is assumed to be unknown.
Therefore the student's t distribution should be used.
