. A 95% confidence interval for P1 - P2 given that P1 = 0.25 with n1 = 40 and P2 = 0.40 with n2 = 120. Give the best estimate for the margin or error, and confidence interval. 2.Test whether there is a difference between two groups in the proportion who voted, if 45 out of random sample of 71 in group 1 votes and 56 out of a random sample of 100 in Group 2 voted. Give the test statistic and p-value.

Q: A poll of 1142 voters asked what the most significant issue was in the upcoming election. 1028 of…

A: X=1028, n=1142 α=0.14 p^=X/n= proportion Margin of error=MOE=Zα/2p^(1-p^)n

Q: A poll of 827 students at Alpha State College found that 61% of those polled preferred a quarter…

A: Given that Sample size n = 827 Sample proportion of students who prefer a quarter system = 0.61 The…

Q: A poll showed that 48 out of 120 randomly chosen graduates of AUAF work in the government. What is…

A: The confidence interval is calculated using the sample statistic, critical value and the standard…

Q: LONstruct the 90% confidence interval for the difference P₁ P₂ when x₁ = 45, n₁ = 85, x₂ = 20, and…

A: We have given that,  X1 = 45, n1 = 85 and X2 = 20, n2 = 65 Then,  We will find the 90% confidence…

Q: Suppose a random sample of 459 married couples found that 307 had two or more personality…

A: There are two independent samples which are two married couples. Both samples follows normal…

Q: A random sample of 364 married couples found that 288 had two or more personality preferences in…

A: Givensample size(n1)=364x1=288p1^=x1n1=288364=0.791n2=574x2=38p2^=x2n2=38574=0.066Confidence…

Q: Obtain the required confidence interval for the difference between twe independent simple random…

A: Here it is given that- In a random sample of 36 democrats from one city, 18 approved of the mayor's…

Q: In studying his campaign plans, Mr. Singleton wishes to estimate the difference between younger…

A: sample size(n1)=769x1=497sample size(n2)=703x2=390confidence level=90%

Q: A poll reported 38% support for a statewide election with a margin of error of 1.36 percentage…

A: Proportion of voters who supports for a statewide election Margin of error Confidence level

Q: truct the 80% confidence interval for the difference p₁-P2 when x₁ = 40, n₁ = 80, x₂=20, and n₂ =…

A: For population 1:The number of successes is .The sample size is .For population 2:The number of…

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given information- Sample size, n = 50 For a random sample of 50 students, the 95% confidence…

Q: A random sample of 380 married couples found that 296 had two or more personality preferences in…

A: Let p1 be the population proportion of all married couples who have two or more personality…

Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

A:

Q: Suppose the number of business majors at liberal arts colleges are normally distributed and have a…

A: Margin of error: Margin of error is a range of values that lie above and below the sample statistic…

Q: A large container contains colored beads. A simple random sample of beads yielded 107 red beads and…

A:

Q: he lower end of the 95% confidence interval is Question Blank 1 of 2and the higher end of the 95%…

A: n=8 Sample sizex= 9.8 Sample mean s= 0.4 Sample standard deviation

Q: Most married couples have two or three personality preferences in common. A random sample of 368…

A: Given Data n1 = 368 x1 = 136 n2 = 574 x2 = 232

Q: A random sample of 370 married couples found that 286 had two or more personality preferences in…

A: Givenx1=286n1=370p1^=x1n1=286370=0.773x2=30n2=572p2^=x2n2=30572=0.052α=1-0.90=0.10α2=0.05zc=zα2=z0.0…

Q: A sample of size 84 was taken from a very large population. Sample statistics, x¯ and s, were used…

A:

Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: Suppose a marketing company randomly surveyed 442 households and found that in 252 of them, the…

A:

Q: Most married couples have two or three personality preferences in common. A random sample of 384…

A: Obtain the 95% confidence interval for the difference between two population proportions. The 95%…

Q: A political candidate feels that she performed particularly well in the most recent debate against…

A: We have given that 95% confidence ( -0.014, 0.064) We have to compute margin of error

Q: Construct the indicated confidence interval for the difference between the two population means.…

A: Given:- The data describes the hours men and women had watched television during the previous week.…

Q: Several years​ ago, 43 43​% of parents who had children in grades​ K-12 were satisfied with the…

A: Solution: Given information: n= 1235 Sample size of parents  x= 536 parents were satisfied in…

Q: A random sample of n1  = 258 people who live in a city were selected and 74 identified as a "dog…

A: given data  n1 =258    x1 = 74p^1 = x1n1 = 74258 = 0.2868 n2 = 102    x2 = 63 p^2 = x2n2 = 63102 =…

Q: 2. A large university conducted a sample survey of 100 first-year students and 100 seniors. Both…

A: given that,sample one, x1 =32, n1 =100, p1= x1/n1=0.32sample two, x2 =38, n2 =100, p2=…

Q: a survey asked a random sample of n= 2752 us adults whether they had visited a public library in the…

A: The number of females said yes (xf) is 726 and the total number of females (nf) is 1423.

Q: Use the Student's t distribution to find tc for a 0.99 confidence level when the sample is 21.

A: We find it's Value from t table at n-1= (21-1)= 20 d.f. and 0.99 confidence level.

Q: 1. Construct a 90% confidence interval for p, the true proportion of all people who used the bus.…

A: Here use basic of confidence interval of proportion

Q: A political candidate is anxious about the outcome of the next election. To have his next survey…

A: A political candidate is anxious about the outcome of the next election. To have his next survey…

Q: A random sample of 388 married couples found that 296 had two or more personality preferences in…

A: From the provided information,