Discussion:
Q: A supermarket manager believes that among the customers buying orange juice, 30% of the customers prefer Brand A, 20% prefer Brand B, and 50% prefer Brand C. Records from sales in a typical week showed the number of orange juice bottles sold is given in the following table.
|
Brand A
|
Brand B
|
Brand C
|
Total
|
|
225
|
154
|
421
|
800
|
|
|
|
|
|
At the level of significance 0.05, do these data support the Manager's belief?