A study suggests that the 25% of 25 year olds have gotten married. You believe that this is incorrect and decide to collect your own sample for a hypothesis test. From a random sample of 25 year olds in census data with size 776, you find that 24% of them are married. A friend of yours offers to help you with setting up the hypothesis test and comes up with the following hypotheses. Indicate any errors you see. H0:^p=0.24HA:^p≠0.24

Q: According to a University Center for Logistics Management, 9% of all merchandise sold in the United…

A: Let X be the number of items returned.Given, X=10 and n=90Null hypothesis:Alternative hypothesis:

Q: You are hired by a university health services department to examine the relationship between flu…

A: 1. The research hypothesis is, whether flu vaccination had really worked for treating flu or not.…

Q: Then the test is: two tailed left tailed right tailed

A: Test is that if the accuracy rate for fingerprint identification is significantly less than 0.34 And…

Q: random sample of 869 births included 430 boys. Use a 0.10 significance level to test the claim that…

A: From the given information we conduct Z test for proportion at alpha

Q: news article that you read stated that 55% of voters prefer the Democratic candidate. You think that…

A: We have given that  Sample size n =207 Favorable cases x =116 Sample proportion p^=x/n  =116/207…

Q: 1970, 570 students among 1000 randomly selected college freshmen thought that capital punishment…

A: Given that  Sample size n1=1000 , n2=1000 Favorable cases x1=570 , x2=480

Q: If you conduct a hypothesis test every so often at a 95% level, about what fraction of the time do…

A:

Q: You are analyzing results for cupcake restaurant. The study aims to determine if the cupcake sales…

A: Given,   You are analyzing results for cupcake restaurant. The study aims to determine if the…

Q: In 1970, 570 students among 1000 randomly selected college freshmen thought that capital punishment…

A: It is given that  For 1970: X1 = 570,  n1 = 1000 For 2005: X2 = 480,    n2 = 1000

Q: Perform a 2-tailed z-test with a=D0.05 to determine if caffeine influences memory.

A: Z-test is a hypothesis test in which the z-statistic follows a normal distribution

Q: A publisher reports that 69%  of their readers own a particular make of car.  A marketing executive…

A: From the provided information,A publisher reports that 69% of their readers own a particular make of…

Q: A car leasing firm's records indicate that the mean number of miles driven annually in its cars has…

A: GivenA car leasing firm's records indicate that the mean number of miles driven annually in its cars…

Q: You work in admissions for an Intensive English Program. The program claims that its students score…

A: Given: No. Of students =26 Mean score=83.9 Standard deviation =20   Note :As per guidelines of…

Q: According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher…

A:

Q: A study was done on different college campuses that showed that 82% of the student population felt…

A: Note- Taking the problem a left-tailed hypothesis according to the statement given in the problem.…

Q: As of 2012, the proportion of students who use a MacBook as their primary computer is 0.31. You…

A:

Q: Evelyn gets a distance of 160 meters, on average, for her golf drives, with a standard deviation of…

A: From the given information we find the solution.

Q: A newsletter publisher believes that over 33% of their readers own a laptop. For marketing purposes,…

A: Given that  Claim: Over 33% of their readers own a laptop.  Decision : Reject the null hypothesis.

Q: You and a friend have several interesting hypotheses about the income of Arkansans. You then survey…

A: Given, μ = 45000s = 2500n = 100M = 50000     To find, A) Test this hypothesis at 10% level of…

Q: According to the Pew Research Center, 14% of adults rate basketball as their favorite sport to…

A: given informtion:  P=0.14 P0=0.23 n=60 probability of a Type I error being 0.05 we want to check the…

Q: Please see below. I need to see if this is correct and whether there is another way to find the…

A: Given that  Sample size n =100 Favorable cases x =7 Sample proportion p^=x/n

Q: In 2011, a U.S. Census report determined that 63% of college students are working students. A…

A: From the provided information,

Q: Identify the type I error and the type II error that correspond to the given hypothesis.   The…

A: Answer:-  Population proportion, P=65%=0.65 Our hypothesis is, H0: P=0.65  vs  H1: P>0.65   Type…

Q: A news article that you read stated that 53% of voters prefer the Democratic candidate. You think…

A:

Q: A cereal company claims that the mean weight of the cereal in its packets is not 12 oz.  Identify…

A: It is given that the claim is that the mean weight of the cereal in its packets is not 12 oz.

Q: 4. Conduct a hypothesis test showing all of your steps. In a packing plant, a machine packs jars…

A: a) Null Hypothesis: H0:μ1=μ2 Alternative Hypothesis: H1:μ1<μ2 b) Here, the alternative is less…

Q: news article that you read stated that 56% of voters prefer the Democratic candidate. You think that…

A: given data, claim:p=0.56x=142n=236p^=xn=142236=0.6017α=0.10

Q: You are hired by a university health services department to examine the relationship between flu…

A:

Q: Suppose the null hypothesis, Ho, is: the mean age of the horses on a ranch is 6 years. What is the…

A: given null hypothesis is mean age of horses on a ranch is 6 years. Type-II error is when we fail to…

Q: Provide a definition in context of the parameter of interest.

A: A population is the collection of all possible events for an experiment. Parameter measures the…

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.