Answer:
0.077994
Step-by-step explanation:
Given that the owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club.

(Right tailed test)
Sample size = 
Sample mean = 30.45
Mean difference =
Sample std dev s = 5
Sample std error = 
Test statistic = Mean diff/std error = 
Since population std deviation is not know we use t test
p value = 
Answer:
yes
Step-by-step explanation:
You just do it
Answer:
What is this ?
Step-by-step explanation:
Sorry i can't answer it because i can't see it.
Answer:
The first and third options are correct so choose both
Step-by-step explanation: