I would say due to isolation from the Pacific Ocean it would be more difficult for surrounding countries to attack, and life on water has developed Japan’s distinctive cultural foods such as exotic seafood.
Answer: 0.375, 1.123 units ppm
Explanation:
n=7 sample size
The mean is 5.24/7=0.749
sd=0.404
CI percentage 95%,
T= 0.975,df=6 is 2.447
TxS/sqrt(n)=2.447*0.404/sqrt(7)=0.374
95%CI = (0.375, 1.123) units ppm
