Year Qtr Planes

2009 Qtr1 361

Qtr2 405

Qtr3 380

Qtr4 479

2010 Qtr1 250

Qtr2 364

Qtr3 277

Qtr4 424

2011 Qtr1 260

Qtr2 282

Qtr3 273

Qtr4 480

2012 Qtr1 314

Qtr2 362

Qtr3 321

Qtr4 517

2013 Qtr1 318

Qtr2 414

Qtr3 350

Qtr4 525

2014 Qtr1 337

Qtr2 379

Qtr3 372

Qtr4 518

2015 Qtr1 285

Qtr2 361

Qtr3 369

Qtr4 559

(c) Use MegaStat or Minitab to calculate estimated seasonal indexes and trend. (Round your answers to 3 decimal places.) Qtr1 Index Qtr2 Index Qtr3 Index Qtr4 Index (d) In which quarters are shipments highest? Lowest? (You may select more than one answer. Click the box with a check mark for the correct answer and double click to empty the box for the wrong answer.) Highest Check all that apply 1 Q1 Q2 Q3 Q4 Lowest Check all that apply 2 Q1 Q2 Q3 Q4