A country club decided to increase the required monthly minimum that members must spend on food from $35 per month to $50 per month in an effort to get the members to spend more money at the club. Prior to the change, the average amount members spent on food per month was $188. Since the change 16 months ago, the average spent on food per month is now $195 with a standard deviation of $39. When testing the hypothesis (at the 5% level of signficance) that the average spent on food has increased, what is the test statistic? (please round your answer to 3 decimal places)