The time needed for checking in at a hotel is to be investigated. Historically, the process has had a standard deviation equal to .146. The means of 39 samples of n = 14are

Sample Mean Sample Mean Sample Mean Sample Mean 3.88 3.76 3.83 3.77 3.86 3.80 3.84 3.79 3.85 3.86 3.90 3.83 3.81 3.84 3.83 3.87 3.88 3.84 3.80 3.88 3.86 3.88 3.81 3.83 3.86 3.82 3.86 3.84 3.87 21 3.84 3.82 3.89 3.86 3.88 3.90 3.81 3.86 3.98 3.96 31 32 12 14 15 24 25 26 27 35 17 37 38 39 30