1. a. $12 million
b. 1st quarter 1999
c. 3rd quarter 1997
d. 3rd quarter is winter, too cold for ice cream!
e. 1st quarter is summer and hot. People eat more ice cream.
f. Looking at first quarter sales: 1997-$16 million, 1998-$18 million and 1999-22 million obviously an increasing pattern.
g. $15 million.
h. There are seasonal effects and a long term increasing trend.
2. a.
b. There are "seasonal" effects with the weekend sales being the peaks and mondays the troughs.
There would also appear to be a slight downward trend although three weeks is too short a period to confirm this feature.
The first Saturday is a small "spike" as the following Saturdays are both the highest sales of the week. This could be due to a wet day or a competitor's sale or a large event that many people have attended that day.
3. a.
b. There is obviously a seasonal component to the data on a weekly cycle. There is an increasing trend for the first three weeks followed by a decline which is the pattern probably expected for new release movies.
