Question

the Old Farmer’s Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 16 people and found that they used on average 119 gallons per day and s = 5.3. at a = 0.05, is there enough evidence to say that the Old Farmer’s Almanac figure might no longer be correct?