Not to good with math but the answer may be B
Answer:
what kind of practice test?
Step-by-step explanation:
i dont understand but if you need help practicing i will help you.
Complete Question
The following is a set of hypotheses, some information from one or more samples, and a standard error from a randomization distribution. Test
vs
when the sample has n 900 , and
with
. Find the value of the standardized z -test statistic. Round your answer to two decimal places.
Answer:
The value is 
Step-by-step explanation:
Generally the standardized test statistics is mathematically represented as

=> 
=> 
=> 
Answer:
B.
Step-by-step explanation:
Answer:
I think 15.
Step-by-step explanation:
20 ÷ 5=4 and 5 × 3=15.