When an opinion poll calls landline telephone numbers at random, approximately 35% of the numbers are working residential phone numbers. The remainder are either non-residential, non-working, or computer/fax numbers. You watch the random dialing machine make 20 calls. (Round your following answers to four decimal places. (a) What is the probability that fewer than 4 calls reach working residential numbers? (b) What is the probability that more than 4 calls reach working residential numbers? (c)Consumer Reports rated airlines and found that 84% of the flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time arrival rate is representative of the entire commercial airline industry, consider a random sample of 188 flights. What is the expected number that will arrive on time? What is the standard deviation of this distribution? (Use 2 decimal places.)

Q: At TCNJ, 35% of the engineering majors belong to ethnic minorities. If 6 students are selected at…

A: Given,n=6p=0.35X=no.of students belong to ethnic minorityX~Binomial (n=6 , p=0.35)P(X=x)=nx pxqn-x…

Q: Twenty-one percent of people say they've seen a ghost or felt its presence. If 13 people are asked,…

A: Answer:- Given, Twenty-one percent of people say they've seen a ghost or felt its presence. That is,…

Q: Management: The Bureau of Labor Statistics reported that 64.7 million women and 74.5 million men…

A: Given Information: The Bureau of labor statistics reported that 64.7 million women and 74.5 million…

Q: The accompanying table shows the numbers of male and female students in a particular country who…

A: The question is about conditional probabilityGiven :To find :a ) Prob. that a rand. selected student…

Q: According to a 2009 Reader's Digest article, people throw away approximately 20% of what they buy at…

A: Given data Probability of throwing away (p) = 0.2 No of grocery shoppers(n) = 100 Probability that…

Q: Suppose the probability of an IRS audit is 2.0 percent for u.s taxpayers who file form 1040and who…

A: Given information- The probability of an IRS audit is 2.0 percent for U.S taxpayers. So, Number of…

Q: Jacobs & Johnson, an accounting firm, employs 17 accountants, of whom 6 are CPAs. If a delegation of…

A: There are total 17 accountants We can select any 4 accountants from 17 accountants in 17C4=2380 ways…

Q: What is the probability of winning the first prize? What is the probability of winning the second…

A: You are at a Data Management Game Fair and decide to participate in a classmate’s letter game. To…

Q: A nurse has found that persons calling a medical advice line who think they have the flu, only…

A: Solution: Let X be the number of callers actually have the flu and n be the sample number of…

Q: In a certain collection of books, 70% of the book are math books, but 68% of the blue books are math…

A:

Q: 40% of people prefer the mountains to the beach. Someone who prefers the mountains is 5 times as…

A:

Q: According to Gallup poll, 36% of all college students use an Apple i phone only.  If a sample of 200…

A: 1. Consider that p is population proportion of all college students who use an Apple i phone.

Q: ACcording to a study conducted by a public health school, a child seated in the front seat who was…

A: Given to a study conducted by a public health school, a child seated in the front seat who was…

Q: Suppose 56% of the students in a university are baseball players.   If a sample of 873 students…

A: Step 1: State the given data: population proportion, p = 56% = 0.56sample proportion, p̂ = 55% =…

Q: 42% of US adults have very little confidence in newspapers. You randomly select 10 US adults. Find…

A: Given that, 42% of US adults have very little confidence in newspapers. Sample size, n = 10

Q: 11 of the 744 digital video recorders​ (DVRs) in an inventory are known to be defective. What is the…

A: From the provided information,11 of the 744 digital video recorders​ (DVRs) in an inventory are…

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: What is the probability that the sample proportion exceeds 0.12?

A: Given According to a 2009 Reader's Digest article. First, we need to find the standard deviation for…

Q: Quality control. An assembly plant produces 40 outboard motors, including 7 that are defective. The…

A:

Q: What is the probability that the sample proportion exceeds 0.12?

A: Let p be the proportion of throw away of what people buy at the grocery state. Given that p=13% =…

Q: Suppose 59% of the students in a university are baseball players. If a sample of 632 students is…

A: The given values are:Population proportion (p) = 59% = 0.59Sample size (n) = 632Desired sample…

Q: If the probability that a randomly chosen college student takes statistics is 0.34, then what is the…

A: The probability that a randomly chosen college student takes statistics is 0.34. The probability…

Q: Suppose 41% of the students in a university are baseball players. If a sample of 524 students is…

A: given:p = population proportion p = 41% = 41/100 = 0.41 n = sample size n = 524 In order to find the…

Q: Jeannie took a week's vacation from school and never made up the work. She is guessing answers on a…

A: If each trial has only two possible outcomes, that is, success and failure, the probabilities of…

Q: Fifty-three percent of all U.S. citizens have some college education. Choose 10 people at random,…

A:

Q: According to a 2009 Reader's Digest article, people throw away about 11% of what they buy at the…

A: From the provided information, Mean (p) = 0.11 Sample size (n) = 90 The standard deviation can be…

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

A:

Q: There are 14 red marbles, 9 white, and 10 black marbles in a box. What is the probability of…

A:

Q: t is estimate that 40% of households own a riding lawn mower. A sample of 11 households is studied.…

A:

Q: ABC garage replaces brakes and shocks. Eighty-five percent of the automobiles that come in need new…

A: The union probability for any two events A and B is defined as P(A or B) = P(A)  + P(B) – P(A and…

Q: Approximately 18% of shoppers used cellphones to look for deals. THe probability of making a…

A: From the given information ,P ( cellphones) = 18% = 0.180.45

Q: 3. Data collected from a website show that 60% of visitors use Scavenger as their web browser. You…

A: The binomial distribution probability is:P(X=x)=nCx​px(q)n−xwhere ::: x represents the total number…

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: A sample of 2500 patients were taken to assess a medical test.  40% of the sample had a positive…

A: Given that A sample of 2500 patients were taken to assess a medical test. 40% of the sample had 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.