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 16,407 children. a. Assuming that this tumor occurs as usual, find the mean number of cases in groups of 16,407 children. b. Using the unrounded mean from part (a), find the probability that the number of tumor cases in a group of 16,407 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? a. The mean number of cases is (Type an integer or decimal rounded to three decimal places as needed.)
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 16,407 children. a. Assuming that this tumor occurs as usual, find the mean number of cases in groups of 16,407 children. b. Using the unrounded mean from part (a), find the probability that the number of tumor cases in a group of 16,407 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? a. The mean number of cases is (Type an integer or decimal rounded to three decimal places as needed.)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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There is also
B. The probability that number cases exactly 0 or 1 is
C. The probability of more than one cases is
D. Let a probability of 0.05 or less be very smalle and let a probability of 0.95 or more be very large
Transcribed Image Text: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 16,407
children.
a. Assuming that this tumor occurs as usual, find the mean number of cases in groups of
16,407 children.
b. Using the unrounded mean from part (a), find the probability that the number of tumor cases in a group of 16,407 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?
a. The mean number of cases is
(Type an integer or decimal rounded to three decimal places as needed.)
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