Answer:
B. Trapezoid
Step-by-step explanation:
Trapezoid is a quadrilateral with only one pair of parallel sides, so it's "B".
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.
Y = 6 because - ( 1 ) + 7 = 6
Answer:
after calculating I got this answer.
hope this answer helps you dear...take care
