Answer:
The length of this gestation period was shorter than the mean length of gestation periods by 1.7 standard deviations.
Step-by-step explanation:
Mathematically, to obtain the z-score, we use the following formula;
z-score = (x-mean)/SD
The z-score obtained can either be positive or negative. When z-score obtained is positive, it shows that the given value is bigger than the mean. In cases where z-score is negative, it means that the value we are calculating is smaller than the mean.
In the given formula, the value x represents the value which we are comparing against the mean value.
