A study was carried out to examine whether the perception of service quality at five-star hotels in city differed by gender. Hotel guests were randomly selected from the lobby and restaurant areas and asked to rate ten service related items (e.g.. The personal attention you received from our employees"). Each item was rated on a 5-point scale (1 = "much worse than I expected," 5 = "much better than I expected"), and the sum of the items for each guest was determined. A summary of the guest scores is provided in the following table.

Is there any evidence to suggest that male guests are on avrage more stisfied with the services thatn female guests at the hotels? Test using ? = 0.05.

Gender Males Females Sample Size 120 110 Sample Mean Score 39.5 36.8 Sample Standard Deviation 6.7 7.5