1) A grocery store carries the following items. There are twomain categories of food – conventional and organic ingredients –and four food groups. The data are shown in the following table.Food Groups Food Categories Grains Fruits Vegetables Meat TotalConventional 82 48 276 204 610 Organic 93 77 24 11 205 Total 175125 300 215 815 If all of the grains and meats were accidentallydisplayed together without a sticker or label to mark their origin,what is the probability that you select a grain or meat that isconventional into your grocery basket? First compute for yourselfthe row (i.e., n1+, n2+), column (i.e., n+1, n+2, n+3, n+4), andoverall (i.e., n++) totals, to aid in answering the question.Answer:
2) Suppose at random 39% of school children develop nausea andvomiting following holiday parties and that you conduct a study toexamine this phenomenon, with a sample size of n=12. What is theprobability that between more than 6 and 10 orless children become sick?
3)
A grocery store carries the following items. There are two maincategories of food – conventional and organic ingredients – andfour food groups. The data are shown in the following table.
| Food Groups |
Food Categories | Grains | Fruits | Vegetables | Meat | Total |
Conventional | 90 | 5 | 10 | 111 | 216 |
Organic | 85 | 120 | 290 | 104 | 599 |
Total | 175 | 125 | 300 | 215 | 815 |
If all of the items were accidentally displayed together withouta sticker or label to mark their origin, what is the probabilitythat you select an organic grain, vegetable, ormeat in your grocery basket? First compute for yourselfthe row (i.e., n1+, n2+), column (i.e.,n+1, n+2, n+3, n+4),and overall (i.e., n++) totals, to aid in answering thequestion.
Answer:
