You are given a daily time series of Sales of a product during Monday October 13, 2014 - Friday, May 22, 2015, that is, for a period of 160 weekdays. An analyst suggested estimating a model with Daily Seasonal Dummy Variables and a Linear Trend.

The results of the estimated model are given below where Friday is used as the reference day. Please answer the following questions based on this information. In any statistical analysis you can use 5% of level of significance.

ANALYST'S ESTIMATED MODEL Model Parameter Estimate Std. Error T Prob > IT! Intercept 105.40249 1 . 5261 69 . 0678 <. seasonal dummy . linear trend .5416 model variance squared>