Problem: A researcher records the crying time (in minutes) of infants given oral administration of sucrose (n = 15) or tap water (n = 19) prior to a heel prick. The mean crying time in the sucrose group was 7.3 minutes, with a standard deviation of 2.9. The mean crying time in the tap water group was 2.3 minutes, with a standard deviation of 1.1.

Required:

Question: If the null hypothesis is that there is no difference in crying time, then what is the decision for this test? Please show steps how you get an answer and please be clear in your explanation.