Saeko owns a yarn shop and want to expands her color selection.

Before she expands her colors, she wants to find out if her customers prefer one brand

over another brand. Specifically, she is interested in three different types of bison yarn.

As an experiment, she randomly selected 21 different days and recorded the sales of each brand.

At the .01 significance level, can she conclude that there is a difference in preference between the brands?

Misa's Bison Yak-et-ty-Yaks Buffalo Yarns

343 365 360

308 368 346

349 351 381

304 339 306

348 366 314

346 331 307

Total 1,998.00 2,120.00 2,014.00

5) What is the null hypothesis?

What is the alternative hypothesis?

What is the level of significance?

6) Use Tools - Data Analysis - ANOVA:Single Factor

to find the F statistic:

7) From the ANOVA output: What is the F value?

8) What is the F critical value?

9) What is your decision?