A missing data value from a set of data has a z-score of - 2.1. Fred already calculated the mean and standard deviation to be

# = 43 and 0-2. What was the missing data value? Round the answer to the nearest whole number.

39

41

45

47

39

Step-by-step explanation:

Data

mean = 43 standard deviation (sd) = 2

The z-score is computed as follows:

z = (x - mean) / sd

where x is a value of interest, in this case, the missing data value. Replacing with data and solving for x:

-2.1 = (x - 43) / 2

-2.1*2 + 43 = x

39 = x