In a study of 396,281 cell phone users, it was found that 55 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a .000144 probability of a person developing cancer of the brain or nervous system. We therefore expect about 58 cases of such cancer in a group of 396,281 people. Estimate the probability of 55 or fewer cases of such cancer in a group of 396,281 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system P(xless than or equals≤55)equals=?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
In a study of 396,281 cell phone users, it was found that 55 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a .000144 probability of a person developing cancer of the brain or nervous system. We therefore expect about 58 cases of such cancer in a group of 396,281 people. Estimate the probability of 55 or fewer cases of such cancer in a group of 396,281 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system
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