Suppose we were told by the superintendent of schools that the probability a randomly selected middle school student would have an IQ between 100 and 120 is P-0.68. If we randomly select five students from the eighth grade, what is the probablity that three of them will have an lQ between 1. 100 and 120?

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: Suppose 56 % of politicians are lawyers. If a random sample of size 873 is selected, what is the…

A:

Q: the probability that more than 17 of the students smoke?

A: Given : n=75 , p=0.277 , q=1-p=1-0.277=0.723 Here  np=75*0.277=20.7750>5 and…

Q: Suppose you sample from the numbers 1 to 1000 with equal probabilities 1/1000. What are the…

A: There are 100 numbers have last digit 0,1,2,...9. The probability of selecting a number is 1/1000.…

Q: The probability that a randomly chosen citizen-entity of Cygnus is of pension age† is approximately…

A: Given that probability that a randomly chosen citizen-entity of Cygnus is of pension age† is…

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: Suppose 42 % of the students in a university are baseball players. If a sample of 628 students is…

A:

Q: Suppose 56% of politicians are lawyers. If a random sample of size 564 is selected, what is the…

A: From the provided information, 56% of politicians are lawyers that is p = 0.56 Sample size (n) = 546

Q: Suppose 58% of politicians are lawyers. If a random sample of size 681 is selected, what is the…

A: It is given that n =681 and p =0.58.

Q: Suppose 47% of the population has a college degree. If a random sample of size 501 is selected, what…

A: It is provided thatp = 0.47, q = 1- p = 1-0.47 = 0.53 and n = 501Consider, the sampling distribution…

Q: In a survey of U.S. adults with a sample size of 2094​, 370 said Franklin Roosevelt was the best…

A:

Q: survey of 2436 men age 18 and older in 1998 for the commonwealth Fund indicated that more than half…

A: If the prior information is not known, we assume that sample proportion is, Critical value: From…

Q: Suppose that 50% of adult Australians believe that Australia should apply to host the next rugby…

A: Given: p=0.5 n=150

Q: According to a study done by Nick Wilson of Otago University Wellington, the probability that a…

A: (a)The conditions for binomial distribution is,Fixed number of trails.The trails are independent and…

Q: A sample of n =32 is selected from a normal population with M = 60,         σ = 20.  What is the…

A:

Q: A recent survey showed that 17% of households spend more than $100 per week on groceries. Assume the…

A:

Q: It is assumed that 78% of the seeds of a certain type of wheat germinate. If we randomly select 340…

A:

Q: Suppose 56% of politicians are lawyers. If a random sample of size 564 is selected, what is the…

A: Given: 56% of politicians are lawyers that is proportion (p) = 0.56 Sample size (n) = 564

Q: If 2 of 20 tires are defective and 6 them are randomly chosen for inspection. What is the…

A: GivenTotal no.of tires(N)=20No.of tires are chosen(n)=6No.of tires are…

Q: Suppose 45% of the doctors in a hospital are surgeons. If a sample of 844 doctors is selected,…

A: Solution: From the given information, the probability of the doctor in a hospital is a surgeon is…

Q: Students at a certain school were​ surveyed, and it was estimated that 18​% of college students…

A:

Q: Suppose a certain study reported that 27.7% of high school students smoke. Random samples are…

A: Solution solution:- Let 'X' be the no.of people in sample that smokertherefore, X~Bin(n,ρ)   n=60,…

Q: Suppose that 25% of fire alarms in a large city are false alarms. Approximate the probability that,…

A: Given that, Probability = 25% = 0.25 Sample size = 100

Q: Based on a​ poll, 68​% of Internet users are more careful about personal information when using a…

A:

Q: The Grocery Manufacturers of America reported that 76% of consumers read the ingredients listed on a…

A: Given that,

Q: Suppose    52%    of    students    support    the    idea    of    paying    student    government…

A:

Q: 7. Suppose that for a very large shipment of integrated circuit chips, the probability of failure…

A:

Q: It is stated by the IRS that 71% of filed returns receive a refund.  If you were to sample 50…

A: According to the given question, it is stated by the IRS that 71% of filed returns receive a refund.…

Q: Suppose 44 % of politicians are lawyers. If a random sample of size 411 is selected, what is the…

A:

Q: If daily records of car usage are examined on randomly selected 36 days from company A and 40 days…

A: The probability distribution of company A is given by x p(x) xp(x) (x-xbar)^2 (x-xbar)^2p(x) 1…

Q: The mean number of patients admitted per day to the emergency room of a small hospital is 1.5. If,…

A:

Q: Current estimates suggest that 80% of the home-based computers in a foreign countr have access to…

A: Given : Probability of success,p = 0.80 Probability of failure,q=(1- 0.80)= 0.2…

Q: Suppose that 28.7% of Canadians contributed to their RRSP (registered retirement fund) this year. If…

A: We have given that,  X be the random variable from binomial distribution with p= 28.7% = 0.287 and…

Q: Find the probability that the sample mean of Xbar = 20 hours, as observed here, less than or equal…

A: We want to find the probability

Q: The life expectan cy of distributed. ーラミmaly years and 46) years people in O man is nor if the mean…

A: From the provided information, Mean (µ) = 106 Standard deviation (σ) = 46 X~N (106, 46) Let X be a…

Q: A Food Marketing Institute found that 42% of households spend more than $125 a week on groceries.…

A: Given that, p = 0.42 1 - p = 1 - 0.42 = 0.58 n = 126

Q: A recent survey taken by Adecco of 1,047 employees found that 28% of them would lay off their bosses…

A: It is given that in a survey taken by Adecco of 1,047 employees found that 28% of them would lay off…

Q: Suppose 45 % of the doctors in a hospital are surgeons. If a sample of 844 doctors is selected, what…

A:

Q: A study was performed to assess the feasibility of a national random digit dialing cellular phone…

A: Given, A study was performed to assess the feasibility of a national random digit dialing cellular…

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: Based on a survey, when 1009 consumers were asked if they are comfortable with drones delivering…

A: Let x be the number of customers comfortable with the drones is represented as 0 + which follows…

Q: According to one study, 40% admit to eating chocolate when stresses. Suppose that 40% figure is…

A: Given that, According to one study, 40% admit to eating chocolate when stresses. If 40% figure is…

Q: A sample of n=36 scores is selected from a normal population with μ=78 and σ=18.   (a) What is the…

A: Mean = 78 Standard deviation = 18 Sample size, n = 36

Q: Suppose the blood types of 400 students were examined, 100 of which have blood type B, and a simple…

A:

Q: Suppose that one third of the new buildings in Centra City are in violation of the building code. If…

A: Let us denote X=the number of building that violate of the building coden=sample size=5p=probability…

Q: Suppose a certain study reported that 27.7% of high school students smoke. Random samples are…

A: Solution: Given data: p = 0.277 Population size (N) = 632 students Sample size (n) = 60 To find: The…

Q: A sample of 4 different calculators is randomly selected from a group containing 20 that are…

A: Given,no.of defective calculators=20no.of non defective calculators=10total no.of calculators=30