Suppose that an event a contains 10 observations and, Ask an Expert

Statistics

1. Suppose that an event A contains 10 observations and event B contains 15 observations. If intersection of events A and B contains exactly three observations, how many observations are in union of these two events?

A. 0 B. 10 C. 22 D. 28

2. Approximately how much of total area under the normal curve will be in interval spanning two standard deviations on either side of the mean?

A. 50% B. 68.3% C. 95.5% D. 99.7%

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M917248

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