Question

In: Statistics and Probability

A rare form of malignant tumor occurs in 11 children in a​ million, so its probability...

A rare form of malignant tumor occurs in 11 children in a​ million, so its probability is 0.000011. Four cases of this tumor occurred in a certain​ town, which had

16,654 children.

a. Assuming that this tumor occurs as​ usual, find the mean number of cases in groups of

16,654

children.b. Using the unrounded mean from part

​(a​),

find the probability that the number of tumor cases in a group of

16,654

children is 0 or 1.

c. What is the probability of more than one​ case?

d. Does the cluster of four cases appear to be attributable to random​ chance? Why or why​ not?

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