A simple random sample of size n < 30 for a quantitative variable has been obtained. Using the normal probability plot, the
correlation between the variable and expected z-score, and the boxplot, judge whether a t-interval should be constructed.
n = 14; Correlation = 0.956
Expected z-Score
70
80
90
100
110
120
70
80
90
100
110
120
NO
Yes