In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were sometimes or always stressful. Ten workers are chosen at random. (a) What is the probability that exactly 7 of them find their jobs stressful? Express your answer in words. (b) What is the probability that more than 6 find their jobs stressful? Express your answer in words. (c) Would it be statistically significant (unusual) if fewer than 4 of them find their jobs stressful? Justify your answer. (d) What is the mean and standard deviation of the number and who find their jobs stressful in a sample of 10 workers? Express your answer in words.

Q: At an inspection line, several motors are inspected. It is known that defects between motors are not…

A: Solution-: Given : λ=5 We find, (a) P[the first defective motor is the fifth motor that you…

Q: Delta Airlines' flights from Chicago to Seattle are on time 50 % of the time. Suppose 11 flights are…

A:

Q: If administrators are selected randomly from the​ faculty, what is the approximate probability that…

A: Given that, No. of teachers = 2000 P(men) = p = 50% = 0.50 P(women) = q = 50% = 0.50 No. of…

Q: Hospital records show that 75% of the patients will recover from a certain disease. i. What is the…

A: According to the provided information, The probability that patients will recover from a certain…

Q: In the United States, voters who are neither Democrat nor Republican are called Independent. It is…

A: From the provided information,It is believed that 9% of voters are Independent that is p = 0.09n =…

Q: If the probability of choosing a red chip from a bucket is 0.4, What is the probability of not…

A: We have the probability of choosing a red chip from a bucket is 0.4

Q: The probability that a school-grade student would drink water, fruit juice, and soda is 0.5, 0.3,…

A: We can select 6 students who will drink water from 15 students in 15C6 ways.  The probability for…

Q: What is the probability of selecting one person at random who is a smoker?

A: From the provided information, Total person = 100 Number of persons who smoke = 54

Q: What is the probability that 8 adults selected at random from the town all have health insurance? G

A: It is given that the random variable X i.e, health insurance follows Binomial distribution with…

Q: Suppose that 9% of college undergraduates suffer from a psychological disorder. What is the…

A: Let p be the probability that an undergraduate has a psychological disorder. Given that p = 0.09 Let…

Q: Given a woman has positive mammography, what is the probability she has breast cancer?

A: Let us define some events A : a woman has breast cancer. B : a woman does not have breast cancer. E…

Q: 15. About 8% of males are color-blind. A researcher needs a color-blind male for an experiment and…

A: Given that Probability of males whose color -blind (p) = 0.08 (8%) a) Probability that She finds a…

Q: If 15% of students like tennis and I expect 500 new students on campus what is the probability that…

A: Probability that students like tennis, p=15% = 0.15 q=1-p= 1-0.15= 0.85 Sample size n=500…

Q: what is the probability that you can score at least 7 on a true/false questionnaire consisting of 12…

A:

Q: What is the probability of picking three spade face cards or two red cards?

A: Here we have to find probability of picking three spade face cards or two red cards

Q: If the probability of being hit by lightning is 1 in 1,000,000, what is the probability of not…

A: Given that , P (being hit by lightning) = 1/1000000 =0.000001

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

Q: In 2021, 500 teachers in GCPS were surveyed. 230 teachers surveyed were Science teachers, 200…

A: Given: N=500 N(S)= 230 N(M)=200  Half of the teachers teaching Math also teach a science subject.…

Q: Supposed that Stephen is the quality control supervisor for a food distribution company.  A shipment…

A: We have given that  Success of probability p =13%=0.13 Number of trials n=10 X~binomial ( n ,p)

Q: a. What is the probability that exactly 10 are from their elementary school? b. What is the…

A: Given:  In one of the biggest schools in Metro Manila, 80% of their high school students are known…

Q: What is the probability of drawing two red cards from a standard deck of 52 playing cards?

A:

Q: Suppose the probability of an IRs audit is 4.2 percent for U.S taxpayers who file form 1040 and who…

A:

Q: Privacy is a concern for many users of the Internet. One survey showed that 59% of Internet users…

A: Let p be the probability of concerned about the confidentiality of their email Based on this…

Q: A survey reveals that 20% of the girls are Riphah come from remote areas. If 20 Riphah Girls are…

A: Given,n=20p=0.2q=1-p=1-0.2=0.8X=no.of girls come from remote area X~Binomial (n=20 ,…

Q: What is the probability there are at least 5 cars in the drive-thru?

A:

Q: If 27% of high school students said that they exercise regularly, find the probability that 5…

A: Given that, the probability of students exercise regularly= 27%= 0.27 P(5 exercise regularly)=?

Q: According to a study 20% of corporate officers are women. Suppose that you select a random sample of…

A: Z-score for proportion:

Q: In one town, 61% of adults have health insurance. What is the probability that 5 adults selected at…

A:

Q: A certain state has the highest high school graduation rate of all states at 75%. a. In a random…

A: GIVEN DATA P(graduate) = p = 0.75sample size n = 10x = no. of graduatesP(x=X) =…

Q: Approximately 10% of the population is left-handed. What is the probability that exactly two…

A: Probability of the population is left-handed(p)=0.10sample size(n)=20Let "x" be the no. of students…

Q: According to a study, 20% of corporate officers are women. Suppose that you select a random sample…

A:

Q: A survey by Altgeld Travel Magazine found that 85% of airline passengers prefer to sleep during…

A: Solution: 6. a. Let X be the number of passenger prefer to sleep during their flights and n be the…

Q: 62% of Armenian students own a personal computer. What is the probability that the proportion of…

A: the pdf of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

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.