a. Let p be the proportion of households in Abbotsford having an exotic pet. Suppose you want to construct a 90% confidence interval for p with a margin of error of 0.05, how large should the sample size be? (Assume that you do not have any knowledge or prior sample about the population proportion p.) (b) Suppose that in a random sample of 350 households in Abbotsford, it is found that 41 of them have an exotic pet. Construct an adjusted 95% confidence interval for the proportion of households in Abbotsford having an exotic pet. What is the margin of error in this case?

Q: A Dean of a certain business school is interested in the difference in proportions of A's given by…

A: Givenn1=800x1=240n2=800x2=160p1^=x1n1=240800=0.3p2^=x2n2=160800=0.2α=1-0.95=0.05α2=0.025zα2=1.96

Q: The Credit Risk Department of a major bank estimates the default rate on loans under $10,000 to be…

A: P=0.011-P=1-0.01=0.99n=1100

Q: Dr. R-P needs help in constructing a 99% confidence interval for the mean of the population of all…

A: Let  X: 80, 68, 72, 73, 76, 81, 71, 71, 65, 53 Mean, x¯=∑xn…

Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: On February 20, 2018 ncbnews.com ran a story titled "Poll: Support for gun control hits record high.…

A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

Q: 4) A simple random sample is to be taken of 572 business majors in a college to estimate the…

A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

Q: A random sample of 100 Colorado residents is selected, and it is found that 82% of them have Subaru.…

A:

Q: Suppose a TA wanted to estimate the proportion of students who failed Stat 119 for the 980 students…

A: Obtain the point estimate for the true proportion of students who failed the course. The point…

Q: A sample of 100 homes in city A and 100 homes in City B was taken to estimate the proportion of the…

A: Given that, A sample of 100 homes in city A and 100 homes in city B were taken to estimate the…

Q: What is the value of the point estimate for our 90% confidence interval? Round your answer to three…

A:

Q: Table 2 shows the nights spent in Malaysia by the tourists from China, Thailand, and Vietnam for the…

A: Introduction: Denote μ1, μ2, μ3 as the mean number of nights spent in Country M by tourists from…

Q: A surprising number of young adults (ages 19 to 25) still live in their parents’ homes. A random…

A: Given  X1=986, n1=2253, X2=923, n2=2629

Q: Suppose that the population of the number of hours slept by all college students the night before…

A: The sample size is 19, sample mean is 6.818, and sample standard deviation is 2.017.

Q: 1. How many three digit numbers can be formed from the digits 1,2,3,4 and 5 if one is not to used as…

A: Given data is 1,2,3,4,5No.of digits =5

Q: Out of 600 people sampled, 528 had kids. 1. The best point estimate for p is  2. The margin of…

A: Given: n = sample size = 600 x = 528 Part 1: The point estimate for p is computed as,…

Q: Suppose we are comparing two populations to see if they have the same mean. A sample from each…

A: Given data p-value = 0.0156 Null and Alternative Hypothesis Null Hypothesis H0: μ1 = μ2 Alternative…

Q: A researcher who wants to test the hypothesis that the population mean of a variable is 85, takes a…

A: We have given that  Sample mean = 81 Sample size n = 50 95% confidence interval.

Q: 7. In 2005 the New Jersey Adult Tobacco Survey found that 22.5% of 464 blacks surveyed said that…

A:

Q: If the number of smokers in a sample of 40 students selected from university A is 12 and the number…

A:

Q: Suppose you are told that a 95%  confidence interval for the average price of a gallon of regular…

A: It is given that the 95% confidence interval for the average price of a gallon of regular gasoline…

Q: If a sample has has a 94% confidence interval of (4.68,5.43), what is the 2-decimal margin of error?

A: Given information- We have given the confidence interval is- C.I = (4.68, 5.43) Lower limit = 4.68…

Q: In a random sample of 145 students, we find that 53% have attended a baseball game at some point in…

A: Given,sample size (n)=145sample proportion(p^)=0.53α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: What is the 95% confidence interval for the difference in the population means using paired samples…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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: Suppose that a random sample of 128 graduate-admissions personnel was asked what role scores on…

A: From the provided information, Sample size (n) = 128 From which 70 answered "very important". Sample…

Q: confidence interval for a population mean is (56,78), with a margin of error of 11. What is the…

A: From provided information, Confidence interval for population mean is (56, 78), with margin of error…

Q: 5. At Community Hospital, the burn center is experimenting with a new plasma compress treatment. A…

A: It is given that  For sample 1: Favourable cases, X1 = 259 Sample size, n1 = 316 For sample 2:…

Q: 7. A recent survey of 500 women indicated that 29% of women over age 55 in the study were widows.…

A: Givensample size(n)=500p^=29%=0.29confidence level=90%

Q: n 2005, Health Canada claimed that 16.3% of Canadian adults are obese. A researcher wanted to check…

A: Given,   The sample proportion is,

Q: Suppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: It is given that the average diastolic blood pressure in the general population is 70 mmHg.…

Q: If the number of smokers in a sample of 160 students selected from university A is 56 and the number…

A: From the provided information,

Q: ppose a data set of 4,000 observations (n-4,000) was analyzed using OLS to examine the factors…

A: In the question we are given the Regression equation for College gpa while independent variables in…

Q: In a random sample of 250 high school students, it was found that 85.2% (213) of them later…

A:

Q: If 64 out of 320 people received fruit in addition to candy what are the 95% confidence interval…

A:

Q: Suppose the Statistics Department at TAMU wants to create a confidence interval for the proportion…

A:

Q: On February 20, 2018 nebnews.com ran a story titled "Poll: Support for gun control hits record…

A:

Q: suppose a random sample of 50 basketball players have an average height of 78 inches. Also assume…

A: Solution: Let X be the random variable defined as the height of a basketball player. Sample size: n…

Q: In a preelection poll, a pollster finds that 442 out of 650 people polled favor Smith. Construct the…

A: We need to construct the 95% confidence interval for the population proportion. We have given the…

Q: In a sample of 624 applicants to the Durmstrang Institute of Sorcery, 133 were accepted. Construct a…

A: The distribution of proportion is given by a normal distribution. In the given case the sample…

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.