a) -7.5
b) -3
c) 2.5
d) 3
Answer: 28.4
Step-by-step explanation:
Given : A set of data with a mean of and a standard deviation of is normally distributed.
Now, the value that is –2 standard deviations away from the mean is given by :-
Hence, the value that is –2 standard deviations away from the mean. = 28.4