A hospital has studied its patient history and had concluded that 2% of patients that have been admitted have been infected with staff bacteria. Which of the following is true ? -the population proportion p is 0.02 -the population proportion p-hat is 0.02 -the sample proportion p is 0.02 - the sample proportion p-hat is 0.02

Q: what would the null hypothesis be if you wanted to test whether a trait segregates in a 9:3:3:1…

A: HypothesisNull Hypothesis (H0) = The data follows the phenotypic ratio (i.e. 9:3:3:1)Alternative…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: From the provided information, Margin of error (E) = 3% that is 0.03 Confidence level = 95% And

Q: A pizza chain advertises that, in recent taste experiment in which their pizza (pizza A) was…

A: Expected value (E) =Total frequency 5

Q: Question: In a random sample of 1000 persons from U.P. 510 were found to be consumers of cigarettes.…

A: Given  X1=510, n1=1000, X2=480, n2=800

Q: If we are dealing with data obtained about the sample means, then we will use the formula z =…

A: Solution

Q: If the word significant is used to describe a result in a news article reporting on a study, Select…

A: When we test a hypothesis and establish a conclusion, we always use the term "statistical…

Q: A simple random sample of 6 observations from a population containing 400 elements was taken, and…

A: In question, Given that a simple random sample of 6 observations from a population containing 400…

Q: 5. A whisky brewery firm in Scotland claims that the proportion of alcohol in their new drink is at…

A: Givenn=sample size=70p^=sample proportion=0.42

Q: An insurance company selected samples of clients under 18 years of age and over 18 and recorded the…

A: Two sample proportion test: Two sample proportion test is used to test the significance difference…

Q: Q1) The percentage of NON Defective production is 10%. If a sample of 5 lap tops randomly been drawn…

A: Let, X = number of defective laptops. p= probability of defective = (1-10%)=(1-.10)=0.9 n=5

Q: (a) If a constant c is added to each r; in a sample, yielding y; = x; + c, how do the sample mean…

A: Given:

Q: A state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: From the given information, let p1 be the proportion of adult smokers in state A.  Let p2 be the…

Q: True? When we collect random samples to test the claim that the proportion of female CIA agents…

A: In a binomial distribution with total number of trails n and probability of success p, the normal…

Q: Suppose you want to test the claim that μ > 25.6. Given a sample size of n = 47 and a level of…

A: We have find  p-value and test statistics..

Q: Many elementary school students in a school district currently have ear infections.  A random sample…

A: Solution: Let p1 be the proportion of students who have ear infections at one school and p2 be the…

Q: A sample of n - 16 scores is obtained from a population with u = 50 and o - 16. If the sample mean…

A:

Q: S. The effectiveness of a flu vaccine is tested by treating one group of subjects with the vaccine…

A: Here use 2 proportion z test

Q: Suppose a company wants to determine the percentage of customers who shop online. How many customers…

A: Given dataError = 3% = 0.03Confidence level = 0.92

Q: ohn Jones a statistician for the US Census Bureau. He has been assigned the task of determining…

A: Solution: Let pC  represents the true population  proportion of female births in California.  pN…

Q: ina previous poll, 35% of adults with children under the age of 18 reported that their family ate…

A: The given data is, p0=0.35, x= 361, n= 1088p^=xn=3611088=0.3318α=0.05

Q: 3. For a population with µ = 40 and o = 8, what is the z-score corresponding to X = 34?

A:

Q: A state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: An independent-measures study is analyzed using the appropriate t-test, and the APA summary is t(56)…

A: Introduction: Denote μ1, μ2 as the true population means for the two groups being compared.

Q: You are told that the proportion p of those who answered "yes" to a poll about internet use is 'p =…

A:

Q: Automobile insurance is much more expensive for teenage drivers than for older drivers. To justify…

A: Given: Sample size, n = 300   Under age 20 Age 20-29 Age 30 or older Observed…

Q: Assume you did an experiment with 3 groups and 16 subjects per group. The sample variances in the…

A:

Q: What is the P (t < -0.3) with a sample size of 13.

A: The sample size is, n = 13 The degree of freedom is, df= n-1   =13-1   =12

Q: Suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

A: As we know that, Sample proportion is given by, p= X/n Where n is sample size.

Q: In what range would you expect to find the middle 98% of most head breadths? Between and If you were…

A: Let x1 and x2 be the head breadths. The middle 98% of most head breadths lies between is,…

Q: In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been…

A: a) From the given information, the number of men had never been screened is 40 and the sample size…

Q: Express the following statement about a population proportion in the p I E where p is the sample…

A:

Q: Suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

A:

Q: The Township Board of Meridian Township wants to know how much public support there is for rezoning…

A: 1. Assume that p is the true proportion of Township residents, who are in favor of the rezoning…

Q: A state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: There are two independent samples which are state A and state B. We have to test whether the…

Q: Suppose a researcher wants to test whether the proportion of people that reflect a certain…

A:

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: We have Ho : p = .4 and H1: p > .4. You run 50 experiments and find that the sample proportion is…

A: GivenH0:p=0.4H1:p&gt;0.4sample size(n)=50sample proportion(p^)=0.42α=0.01

Q: Asha owns a car-wash and is trying to decide whether or not to purchase a vending machine so…

A: Power of test depends on 4 factors namely-sample size, standard deviation, effect size and…

Q: Is there a significant difference in political ideology? (On this scale, 10 means "very…

A: Given data: Let X denotes the data regarding freshman. Number of freshman included in the sample,…

Q: What is the P(t > -0.4) with a sample size of 13.

A:

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A: The assumptions and conditions under which a claim about a population proportion can be tested, are…

Q: The researchers from a study interviewed two random samples, one in 2015 and one in 2018. Both…

A: The best estimate of p is obtained by pooling the data to get the proportion of successes in both…

Q: An environmentalist wishes to conduct a hypothesis test on the percentage of cars driven in the city…

A: Given, n=152 p=0.07

Q: In what range would you expect to find the middle 50% of most head breadths? and Between If you were…

A:

Q: In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been…

A: We have a random sample of 50 men and 20 of them had never been screened Also it was thought that…

Q: If you have samples of n1=19 and n2=17​, in performing the​ pooled-variance t​ test, how many…

A: Given,  n1=19 and n2=17

Q: Up-County Associates is hired to estimate the proportion of county households that own three or more…

A: Given that Up-County Associates is hired to estimate the proportion of county households that own…

Q: Does it appear that there is too much mercury in tuna sushi? O A. Yes, because it is possible that…

A: A food safety guideline is that the mercury in fish should be below 1 part per million. The given…

Q: -One Sample Dichotomous Outcome- Suppose a similar study was conducted two years ago and found that…

A: Giventhe prevalance of smoking among freshman = 27% = 0.27We assume to use 95% confidence interval…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.