The amount of pyridoxine (in grams) per multiple vitamin is normally distributed with m = 110 grams and Q(standard deviation)= 25 grams. A sample of 25 vitamins is to be selected. So, the middle 70% of all sample means will fall between what two values?
A. 104.8 and 115.2
B. 108.4 and 112.5
C. 115 and 100.7
D. 85 and 125
Answer:A
The amount of pyridoxine (in grams) per multiple vitamin is normally distributed with m = 110 grams and Q(standard deviation)= 25 grams. A sample of 25 vitamins is to be selected. So, the middle 70% of all sample means will fall between what two values?
A. 104.8 and 115.2 B. 108.4 and 112.5 C. 115 and 100.7 D. 85 and 125