In a recent survey in a Statistics class, it was determined that only 60% of the students attend class on Fridays. From past data it was noted that 98% of those who went to class on Fridays pass the course, while only 20% of those who did not go to class on Fridays passed the course. What percentage of students are expected to pass the course? a. b. Given that a person passes the course, what is the probability that he/she attended classes on Fridays?

A telemarketing firm conducts surveys with a 40% historical response rate. What is the probability that in a new sample of 400 telephone calls at least 150 individuals will respond. In other words, what is the probability that the sample proportion will be at least 150/400?

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 information 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. b. C. d. 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?

Help Save Mark Zuckerberg, the founder of Facebook, announced that he will eat meat only from animals that he has killed himself (Vanity Fair, November 2011). Suppose 257 people were asked, "Does the idea of killing your own food appeal to you, or not?" The accompanying contingency table, cross-classified by gender, is produced from the 187 respondents. Male Female Yes 35 20 No 56 76 The probability that a respondent to the survey is male is the closest to Multiple Choice 0.38 0.64 6 of 10 Next > < Prev oscarch

According to a government statistical organization, the unemployment rate for workers aged 19 to 25 in April 2018 was 7.7%. Consider a random sample of 90 workers from this age group. a. What is the probability that 6 or fewer will be unemployed? b. What is the probability that 3 or fewer will be unemployed? c. What is the probability that between 3 and 9 of them will be unemployed? a. The probability that 6 or fewer workers will be unemployed is (Type an integer or decimal rounded to four decimal places as needed.) atcrunch Get more help - ... Similar question Next

Staff, Inc., a management consulting company, is surveying the personnel of Acme Ltd. It determined that 35% of the analysts have an MBA and that 40% of all analysts are over age 35. Further, of those who have an MBA, 30% are over age 35.a. What is the probability that a randomly chosen analyst both has an MBA and also is over age 35?b. What is the probability that a randomly chosen analyst who is over age 35 has an MBA?c. What is the probability that a randomly chosen analyst has an MBA or is over age 35? d. What is the probability that a randomly chosen analyst who is over age 35 does not have an MBA? e. Are the events MBA and over age 35 independent? f. Are the events MBA and over age 35 mutually exclusive? g. Are the events MBA and over age 35 collectively exhaustive?

16% of individuals insured by AllState have received at least one traffic ticket.  For a sample of 135 insured individuals, what is the probability that between 14 and 27 of them have received at least one ticket? (Round to four decimals).

The percentage of mechanical-, civil-, aeronautical-, industrial-, and chemical-engineer- ing students in the course, Engineering Mathematics, is, respectively, 25, 20, 15, 22, and 18. The probability of a mechanical-, civil-, aeronautical-, industrial-, and chemical-en- gineering students getting the grade A is 0.7, 0.6, 0.8, 0.5, and 0.65, respectively. If a student chosen at random at the end of the semester earned an A in the course, find the probability of the student belonging to mechanical engineering.

A recent survey by a market research company found that 56% of all US households have internet access. Answer the following as decimals rounded to three places. a. If five households are chosen at random, what is the probability that all five have internet access? Preview b. What is the probability that none of the five have internet access? Preview c. If five households are chosen, what is the probability that at least one household has internet access? Preview

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