Mr. Takei plans to add a new flavour of mochi ice-cream to his menu at his Japanese restaurant. He prepared two candidates: coconut and matcha (green tea). To gauge which flavour will be more popular among his customers, he randomly selected 100 customers and offered them a complimentary mochi with one of the two flavours. 50 customers were offered the matcha flavour and the other 50 the coconut flavour. Each customer was asked to rate the ice-cream flavour they tried using a scale of 1 - 5, 1 being 'strongly dislike', and 5 being 'strongly like'

1. Following are the summary statistics for the two flavours. Can you construct a 95% CI fot the mean ratingof matcha mochi. Do you have to make any assumption?

flavor mean sd n

1 coconut 4.32 0.8675 50

2 matcha 3.80 1.0879 50