44% of U.S. adults have very little confidence in newspapers. You little confidence in newspapers is (a) exactly five, (b) at least six, and (c) less than four. (a) P(5) = (Round to three decimal places as needed.)

Q: Thirty-four percent of U.S adults have very little confidence in newspapers. You randomly select…

A: The binomial probability distribution is, PX=x=nxpx1-pn-x In the formula, n denotes the number of…

Q: Doctors nationally believe that 78% of a certain type of operation are successful. In a particular…

A: Introduction: Denote p as the true national proportion of operations that are successful. As it is…

Q: Find tα/2 when n=12  for the  95% confidence interval for the mean.

A: Given information- Sample size, n = 12 Confidence level, c = 0.95 So, significance level (α) = 0.05

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: Given, Nationally, 83% of Americans have earned a high school diploma.  We want to see if the…

Q: A survey of needy and disabled youths showed that 45% of those who had no preschool education were…

A: Part a:Conditional probability: For 2 events A and B, the probability of A given B is, P (A | B) = P…

Q: Jeffrey thinks that students on the baseball team who drink Sporty brand sports drink score more…

A: In the given problem,  Jeffrey thinks that students on the baseball team who drink Sporty brand…

Q: 2. A decade-old study found that the proportion, p, of high school seniors who believed that…

A: Given that,possible chances (x)=165sample size(n)=240success rate ( p )= x/n = 0.6875success…

Q: A survey of needy and disabled youths showed that 52% of those who had no preschool education were…

A: Let, 'A as the event that the youth had pre-school education. B as the event the youth were arrested…

Q: When walking down a narrow passageway, such as on a train, or between rows of lab benches, is it…

A: Given information: n = 30 x = 21 p^=xn=2130=0.70

Q: Is there evidence that the proportions of 14- to 18-yearold girls who have or have not gotten into…

A:

Q: A researcher claims that the incidence of a certain type of cancer is less than 5%. To test his…

A: In this context, a researcher claimed that the proportion of incidence of particular type of cancer…

Q: Beth wants to determine a 90% confidence interval for the proportion of high school students in a…

A: We have given that,  Population proportion (p) = 0.57, margin of error (E) = 0.04 and confidence…

Q: n July 2018, the Gallup Poll asked a random sample of 1033 American adults, "Has drug abuse ever…

A: Margin of error is the error due to random sampling. Margin of error decreases with increase in…

Q: 6) How many people should I poll to guarantee the actual error on PN is less than e with 90%…

A: Given information: N = Total number of people polled N. p^N=Number of people polled who supported…

Q: A study conducted by a research group in a recent year reported that 57% of cell phone owners used…

A: Introduction: Denote X as the random variable of interest here, which is the number of cell phone…

Q: A statistician computed the Z-scores of all the observations in a sample and after he added all of…

A: The Z-score for the ithobservations in a sample is given by :  Zi=xi-μσ The sum of the Z-scores for…

Q: (d) A 95% confidence interval for (P240K - P<40K) is (-0.02, 0.16).

A: (d) The 95% confidence interval for p&lt;40k , p≥40k is (-0.16 , 0.02).

Q: 58% of students entering four-year colleges receive a degree within six years. Is this percent…

A: P-value in the context of the study: If the population proportion of students who played…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: When nothing is known about the population proportion (p), Consider p=0.50. Find z-critical value:…

Q: Find tα/2 when  n = 25 for the 95% confidence interval for the mean.

A: It is given that, the confidence level is 0.95.

Q: Historically, the proportion of people who trade in their old car to a car dealer when purchasing a…

A: Solution: Given information: n= 115  Sample size  x= 46 success  p^=xn=46115=0.40 sample proportion…

Q: an IQ higher than 90% of the population was obtained by taking the webchers IQ test, what is the IQ…

A: Given: Population mean IQ score using Stanford Binet intelligence test μ = 100 Population standard…

Q: A market research study conducted by a local winery on white wine preference found the following…

A: Let p1 denote the proportion of women who prefer white wine, p2 denote the proportion of men who…

Q: A tv sports commenter wants to estimat th proportion of citizens who "follow professional football."…

A:

Q: How many people should I poll to guarantee the actual error on qn is less than e, with 90%…

A: Given we dont know p, we use p = 0.5 to get a conservative value of the sample size as for p =0.5,…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: The sample size is an amount of a thing that we extract from the population. For every calculation…

Q: a​ poll, ​37% of the people polled answered yes to the question​ "Are you in favor of the death…

A:

Q: According to the U.S. Census Bureau, 69% of children under the age of 18 years in the United States…

A: P =percentage of all children under the age of 18 years in the US live with two parents. n = number…

Q: A research center claims that 31% of adults in a certain country would travel into space on a…

A: To testH0:p=0.31H1:p≠0.31 where p0=0.31

Q: 9) How many people N should you poll to guarantee the actual error between ĝn and q is less than e,…

A: 9. From the part 8, q^N follows Normal distribution with Eq^N=q and variance Eq^N=4*p^N1-p^NN.…

Q: A recent survey conducted in a nearby town showed that 791 out of 1,495 people do most their holiday…

A: Here, the sample proportion is =7911495=0.5291 Now, for 90% confidence z=1.645

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students…

A: From the given information, the claim of the problem is fewer than 20% of Evergreen Valley College…

Q: (a) Starting with the 75% estimate for Italians, how large a sample must you collect in order to…

A: The method of Sample Size and margin of error will be used: In a confidence interval, the range,…

Q: An organization published an article stating that in any one-year period, approximately 11.5 percent…

A:

Q: In a random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to…

A: Hypotheses:   Here p1 and p2 be the two proportions. The aim is to check whether p1= p2. The null…

Q: A dietician read in a survey that 70.5% of adults in the U.S. do not eat breakfast at least 3 days a…

A: It is need to be tested whether the population proportion of adults in U.S who do not eat breakfast…

Q: If n=450 and p (p-hat) 0.83, construct a 90% confidence interva Give your answers to three decimals.

A: given p-hat = 0.83 n=450 the confidence interval is   σp'=p(1−p)np=p'±[Z(a2)p'(1−p')n] z at 90% is…

Q: A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress.…

A: The test statistic for a single proportion, Z=p-PP(1-P)nwhere p=sample proportionP=population…

Q: A department store will place a sale item in a special display for a one-day sale. Previous…

A: Given datan=2027p=29%

Q: 7. Suppose a researcher wants to estimate the difference in proportions of firstborn between the…

A: let us assume p^=0.5margin of error (E)=0.05α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Obtain the sample size of a preliminary estimate for p is 0.51 with the 94% confidence. The formula…

Q: Find the 99% confidence interval given the ff: z=2.575 n=100 x=150 o=4

A: From the given information, Sample size n =100 Sample mean, x̅=150 Population standard deviation, σ…

Q: A team of engineers at the research center of a car manufacturer performs crash tests to determine…

A: Solution:- from given information Null hypothesis H0:p=0.08Alternate hypothesis…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A: (a) Given that,  x=54,n=382 The sample proportion is, Critical values: By using the standard normal…

Q: How many people should I poll to guarantee the actual error on pN is less than e with 90%…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Solution: From the given information, confidence level is 0.95 and E=0.025.

Q: An experiment was designed to compare the lengths of time that four different drugs provided pain…

A: Test hypotheses: There are 4 types of old drugs. Denote the true average time of each of the 4 drugs…

Q: 3 out of 4 american adults under age 35 have eaten pizza for breakfast. if a random sample of 20…

A: Let the R.V X denotes the number of adults eaten pizza for breakfast and it follows the binomial…

Q: A city official claims that the proportion of all commuters who are in favor of an expandedpublic…

A: A city official claims that the proportion of all commuters who are in favor of an expanded public…

Q: A random sample of 100 voters is taken to estimate the proportion of a state’s electorate in favor…

A: Here, the sample size is 100 and the proportion of a state’s electorate in favor of increasing the…