A courier service advertises that its average delivery time is less than 6 hours for local deliveries. A random sample of times for 10 deliveries to an address across town was recorded. These data are shown here (in hours) \\[ 4,5,3,4,4,3,3,3,3,4 \\] Assume that the times are normally distributed. Is this sufficient evidence to support the courier's advertisement, at the \5 level of significance