A random sample of n measurements was selected from a population

(a)   n=85, x¯=23.8, s=3.75   ≤μ≤ 

(b)   n=120, x¯=62.7, s=4.52   ≤μ≤ 

(c)   n=80, x¯=50.6, s=2.67   ≤μ≤ 

(d)   n=85, x¯=91, s=2.73   ≤μ≤