Hawaii tourism. Much of the public and private industry in Hawaii depends on tourism. The following time series plot shows the total number of visitors to Hawaii by air from the rest of the United States per month from January 2002 to December 2006.

a) Interpret the P-value for the trend coefficient.

b) You are planning to visit Hawaii and hope to avoid the crowds. When should you go? (Name the two best months.)

c) You are planning to advertise your product (a new sunscreen/
massage oil combination) to tourists visiting Hawaii. What two months would be the best times to advertise?

d) How many tourists would you predict for Hawaii in April 2007 (month 63 of this series)?

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Domestic Visitors 525,000 450,000 375,000 300,000 + Whether + 0 10 20 30 40 50 60 Time Here is a regression model fit to these data with dummy variables for months and a Time variable that starts at 0 and counts months: Dependent variable is: Domestic Visitors R squared 95.5% s-14336 with 60 Variable Coeff R squared (adjusted) - 94.4% 13 47 degrees of freedom SE(Coeff) t-ratio P-value Intercept 312.312 6925 45.1 0.0001 Time 2016.84 109.1 18.5 0.0001 Feb 8924.36 9068 0.984 0.3301 Mar 58.693.7 9070 6.47 0.0001 Apr 20.035.3 9073 2.21 0.0321 May 19.501.0 9078 2.15 0.0369 Jun 90.440.8 9084 9.96 0.0001 Jul 132,893 9091 14.6 0.0001 Aug 96.037.3 9099 10.6 0.0001 Sep -27.919.7 9109 -3.07 0.0036 Oct 1244.42 9120 0.136 0.8921 Nov -12,181.4 9133 -1.33 0.1887 Dec 39.201.9 9146 4.29 0.0001