The table shows restaurant customers' spending on food  and drinks  1Q The plot below shows restaurant customers' spending on food an drinks

2   9

3

4   0   1   2   3   8   9

5   1   1   1   2   3   4   4   5   6   7   8   9   9   9

6   1   2   2   3   4   4   5   6   7   7

7   0   0   2   3   3   4   5   6   9

8   0   1   7   8   9

9   5   6

10  0

11

12   2

Key 2  9=$29     

What specific patterns in the Data does reveal?

2Q Suppose you are a gym owner and you want to know if the average spent in the gym varies according to client's agents age. You classify your clients into three groups : less than 30, 30, and 50. What significance test would you use, and why?

3Q Assume you work in a marketing department of high-end department store. You sent out "Thank You" cards with a short customer satisfaction one week after purchase. You wonder if survey responses rates would increase significantly from your current rate of 14% if you change the time you send  out your surveys. You take a random sample of 100 customers and send out the survey one day after the purchase. You found out that the new survey response rate is 17%. 

State the null and alternative hypothesis. Be specific as possible