"The Comfortable suites" hotel has an average of 300 visitors staying at its facilities per week. The marketing manager introduced a new marketing plan that is aimed at increasing the number of people staying at its facilities per week.

A survey was conducted over the last 35 weeks to test the marketing manager's claim that the new plan increased the number of people staying at the hotel.

The data provided indicate the number of people that stayed at the hotel per week, for the last 35 weeks.

Week Number of people staying at the hotel

1 200

2 300

3 380

4 250

5 350

6 320

7 300

8 220

9 220

10 420

11 340

12 140

13 440

14 320

15 440

16 290

17 290

18 480

19 350

20 440

21 300

22 110

23 260

24 320

25 480

26 310

27 280

28 400

29 410

30 390

31 420

32 260

33 290

34 320

35 440