If the probability that a fluorescent light has a useful life of at least 900 hours is 0.7, find the probabilities that among 18 such lights (a) exactly 16 will have a useful life of at least 900 hours, (b) at least 14 will have a useful life of at least 900 hours, and (c) at least 3 will not have a useful life of at least 900 hours.

Q: WOW THANKS! Can you help with question 18 too? I realized I already answered 20 after i sent it

A: Here is the solution:

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.