0.00009 might help I’m not sure about the possible answers but that one seems reasonable
Answer:

Step-by-step explanation:


Answer
Where is the picture
Step-by-step explanation:
Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation : 
The formula to find the standard error of the mean is given by :-

i.e. 
Hence, the standard error of the mean =0.5