An organization conducts an annual survey of cybersecurity at firms from around the world. In a recent year, the organization sent survey questionnaires via email to all professionals that hold a certified nformation security manager designation. Of the 1,401 firms that responded to the survey, 1,107 (or 79 %) expect to experience a cyberattack (for example, aMalware, hacking, or phishing attack) during the year. You are to estimate the probability of an expected cyberattack at a firm during the year with a 95% confidence interval. Answer the followings: a. 5. ». 1. What is/are the critical value(s)? What is the margin of error? Identify the 95% confidence interval for the probability of an expected cyberattack at a firm during the year. If the margin of error should be 0.02 or less, what would be the minimum sample size?

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A pew research center survey asked adults in the United States which technology would be very hard to give up. The following responses were obtained internet 70% smart phone 60% email 30% and land line 25%. If 20 adults internet uses are surveyed what is the probability that 3 users will report that it would be very hard to give up?

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14 percent of the school age population attends private schools and 1% of those get​ executive-level positions later in their careers. This compares with0.1​%of people who attend state schools achieving​ executive-level positions. What is the probability that a randomly selected person in an​ executive-level position had attended a private​ school?

A bank recently discovered that approximately 1.6% of all commercial loans issued by the bank become delinquent. Norah, the bank's vice president of operations, is stunned by this discovery. In order to be prepared for the next board meeting, she investigates the matter by randomly selecting 554 commercial loans from the bank’s database and reviewing each loan. What is the probability that at least 12 of the loans in the sample are delinquent? Use Excel to find the probability. Round your answer to four decimal places.

Based on historical data, your manager believes that 31% of the company's orders come from first-time customers. A random sample of 119 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.24 and 0.37?

Name the method of estimating probabilities based on experience or institution.