Question

Brainliest + 20 points to whoever helps!!!

Under which circumstances should you use a two-population z test?
a. The standard deviation is unknown.
b. The sample size is less than 30.
c. The population is slightly skewed and n > 40.
d. The standard deviation is known and n > 30.

Answer 1

Answer:

D. The standard deviation is known and n > 30.

Step-by-step explanation:

• Your sample size is greater than 30.
• Data points should be away from each other.
• Your data should be commonly categorized.
• Your data should be randomly picked from a population. Each item should have an equal chance of being selected.
• The sample sizes should be equal.