According to a study conducted by the Gallup organization, the proportion of Americans who are afraid to fly is 0.10.  A random sample of 1100 Americans is taken and they are asked if they are afraid to fly.  Find the probability that the sample portion of Americans in the sample who say they are afraid to fly is greater than 12.

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of female students is 20. Thus, the total number of students is 20+20 = 40.

Q: The IQ of children in a special education class are normally distributed with µ=95 and Q=10 What is…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 The number of female students is 20. The total number of students…

Q: Charlie wishes to investigate the effects of gummy bears which have been claimed to help increase…

A: The null hypothesis claims that there is no difference between the speeds, so the ratio of speed…

Q: The coach of a running team thinks that 45% of athletes can run a mile in under 7 minutes. A simple…

A: Given problem Given that   The coach of a running team thinks that 45% of athletes can run a mile…

Q: The Centers for Disease Control and Prevention say that about 24% of teenagers vape. A college has…

A: It is given that, n = 645 and p=0.24.

Q: GreenFacts, a non-profit organization,reports that the average adult in Europe consumed 17 litres of…

A:

Q: An economics professional body estimates that 75% of the students taking undergraduate economics…

A:

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated…

A: Given that, 40% of adult Australian sheep dogs weigh 65 pounds or more. Sample size = 18

Q: A poll showed that 70.5% of Americans say they believe that some psychics can help solve murder…

A: We will use the complement property of probability  Total probability is = 100%  And given that…

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated…

A: Binomial distribution :  If X follows Binomial distribution with number of independent trial n and…

Q: According to an article published at heart.org in 2015 regarding a variety of US health data: Given…

A: Solution: Given information: Let A  be the event that someone in the US has a first time  heart…

Q: A pharmaceutical company claims that 20% of those taking its new allergy medication will experience…

A: Of the people who take the new allergy medication of the company, p = 20% will experience…

Q: What is the probability of selecting a sample with the proportion of females being 0.56 or greater?

A: here p =  proportion of female in US =  0.51  n = 500

Q: It is known that 20% of people ride public transport without paying for it. We talk to 68 people who…

A: From the provided information, 20% of people ride public transport without paying for it that is…

Q: Just before a referendum on a school budget, a local newspaper polls 412 voters to predict whether…

A:

Q: According to a 2009 Reader's Digest article, people throw away about 14% of what they buy at the…

A: Solution: It is given that people throw away about 14% of what they buy at the grocery store. So,…

Q: She then conducts a hypothesis test to see whether there is significant evidence to conclude that…

A: The hypotheses can be constructed as: H0: The speeds are the same i.e. no effect from ingesting…

Q: Question 20, problem in photo!

A: The completed table is shown below.

Q: While driving to work, Arceli passes through 3 stop lights. The probability distribution of the…

A:

Q: The centers for disease control reported that 16% of college aged individuals used vapes in…

A: Given information Probability of using vapes = 0.16 No of individuals n = 750 Probability that less…

Q: Just before a referendum on a school​ budget, a local newspaper polls 357 voters to predict whether…

A: Given, n = 357 p = 53% = 0.53

Q: Should the one-tailed or the two-tailed probability be used to assess performance  of the students?

A: The tail of the test depends on the alternative hypothesis of the test. The possible alternative…

Q: 3. A survey asked 500 Americans to rate their health. Of those surveyed, 270 rated their health as…

A:

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 and the number of female students is 20.

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated…

A:

Q: According to a 2009 Reader's Digest article, people throw away about 12% of what they buy at the…

A: Let X be the proportion of things throw away that people bought at the store. The population…

Q: A  survey was done to see which platform people prefer the most.    Facebook Instagram Snapchat…

A: Let us take the probability of choosing someone who prefers Instagram as P(A) and the probability of…

Q: The number of death due to diabetes and kidney disease for an American during 2015 is respectively…

A: The number of death due to diabetes and kidney disease for an American during 2015 is respectively…

Q: ) What proportion of students studied more than 35 hours? ) What is the probability that a randomly…

A: Let X denote the time spent studying the week before final exams. Given that X follows N(mean = 24,…

Q: A survey was conducted to determine the proportion of Grade 11 students who engage in under-age…

A: We have given that p = 0.70 n = 100 We have to calculate  P(x> 0.65)

Q: What is the probability of sampling a score of    X = 55 or greater from a population with μ = 50…

A: Given: μ = 50 σ = 15 Thus, X ~ N(μ = 50, σ = 15)

Q: Waleed decided to construct a probability distribution of tossing five coins. Construct a…

A: Construct a probability distribution table for the given experiment using the binomial experiment.…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 and the number of female students is 20.

Q: What is the probability that the sample mean cholesterol level is greater than 212? The probability…

A: Mean = 204and sd = 42.5

Q: An economics professional body estimates that 80% of the students taking undergraduate economics…

A:

Q: Organ Donors USA Today provided information about a survey of 5100 adult Internet users. Of the…

A: There are 100 adults who are randomly selected from each state and the District of Columbia.

Q: A poll showed that 71.2% of Americans say they believe that some psychics can help solve murder…

A: From the given information, it is observed that the probability of Americans who they believe that…

Q: A poll showed that 52.7% of Americans say they believe that life exists elsewhere in the galaxy.…

A: Given, A poll showed that 52.7% of Americans say they believe that life exists elsewhere in the…

Q: A. If 75% of high school students are able to pass a stats test, find the mean, variance, and…

A: (A). It is given that 75% of high school students are able to pass a stats test. Thus,

Q: According to a study done by the Seattle City Council, 65% of Seattle adults own a car. Assume this…

A: The population proportion is p=0.65 The required probability is…

Q: Suppose the time he spent surfing the website per day is normally distributed, µ = 8 minutes and σ =…

A: The probability that the sample mean is less than 8 minutes is 0.5 and it is obtained below:

Q: Just before a referendum on a school​ budget, a local newspaper polls 356 voters to predict whether…

A: We are given,

Q: A healthcare agency reported that 51% of people who had coronary bypass surgery in 2008 were over…

A:

Q: If the rework percentage increases to 4%, what is the probability that all 20 samples do not require…

A: 1. Let , X be the number of parts in the sample that does not require rework. Here , X→B(n=0.01 ,…

Q: In an experiment, college students were given either 4 quarters or a one dollar bill and they could…

A:

Q: direct mail company wishes to estimate the proportion of people on a large mailing list that will…

A:

Q: A poll showed that 47.4% of Americans say they believe that some psychics can help solve murder…

A: From the given question,It is given that the probability of Americans who they believe that some…

Q: What is the probability of selecting a score greater than 50 from a positively skewed distribution…

A: The given values are, Since the distribution of X is not a bell shaped distribution , and we use…

Q: There are 6 radar stations and the probability of a single radar station detecting an enemy plane is…

A: Solution: Let X be the random variable that the number of radar station detecting an enemy plane.…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.