identification at their voting place in order to vote.  A random sample of 30 Americans is selected.    What is the probability that at least 25 favor requiring photo identification?

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Suppose you select a letter at random from the word MISSISSIPPI. What is the probability of NOT selecting the letter I?

An experiment consists of drawing 1 card from a standard​ 52-card deck. What is the probability of drawing a heart

Advertisers contract with Internet service providers and search engines to place ads on websites. They pay a fee based on the number of potential customers who click on their ad. Unfortunately, click fraud—the practice of someone clicking on an ad solely for the purpose of driving up advertising revenue—has become a problem. According to BusinessWeek,  42% of advertisers claim they have been a victim of click fraud. Suppose a simple random sample of  220 advertisers will be taken to learn more about how they are affected by this practice. Use z-table. a. What is the probability that the sample proportion will be within +/- 0.05 of the population proportion experiencing click fraud? (to 4 decimals) b. What is the probability that the sample proportion will be greater than 0.45 ?(to 4 decimals)

A group of four workers is needed to participate in a workplace joint health and safety committee. The following volunteers are available: 3 from the human resources department, 2 from accounting and finance, 4 from marketing, and 3 from manufacturing. What is the probability of selecting no volunteers from accounting and finance?

A. You want to study gender gaps in pay in Fortune 500 companies. a. What would be your sampling frame? b. How many companies would you study? What would be the probability that a company would be included in your study? You want to be sure that you include at least 30 retail companies and 30 information companies in order to test whether the gender gap in pay differs between them: how could you do this and still retain a probability sample? d. If your sample included only 30 retail and 30 information companies selected in the way you specified in (c): i. ii. C. Could you generalize to all Fortune 500 companies? Briefly explain. Could you generalize to all retail and information companies on the Fortune 500 list? Briefly explain.

In 2014, the percentage of the U.S. population that speak English only in the home is 78.9%. Choose 15 U.S. people at random. What is the probability that exactly one-third of them speak English only? At least one-third? What is the probability that at least 9 do not speak English in the home?