A study reports that 75 percent of young adults in a county get their news from online sources. A sociologist believes that the percentage is actually greater than 75 percent. The sociologist will select a random sample of young adults from around the county to interview. Which of the following is the most appropriate method for investigating the sociologist’s belief?     A one-sample zz-test for a difference in population proportions A A one-sample zz-test for a sample proportion B A one-sample zz-test for a population proportion C A two-sample zz-test for a difference in population proportions D A two-sample zz-test for a difference in sample proportions

Q: National data indicates that​ 40% of households own a desktop computer. In a random sample of 570​…

A: We are given the following data: Population mean , μ  = 0.40 Sample size, n = 570 Sample mean, x̅ =…

Q: A sociologist wants to study what proportion of people have significant relationship problems due to…

A: Given information: The previous study indicated that the percentage of people who have significant…

Q: Public relation companies conducted two surveys about deodorants.  The first survey asked a random…

A: Given ; n1 = 500 n2 = 550 p̂1 = 0.68 p̂2 = 0.44

Q: When comparing two population proportions, what is the null hypothesis if the alternate hypothesis…

A: Solution: From the given information, the alternative hypothesis is p1>p2.

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: 22. It is believed that the type of schools where families send their children depends on income…

A: To test the relation between two categorical variables, the chi-square test of independence is…

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

A: State the hypotheses.   From the information, given that the study is test whether the proportion of…

Q: It is claimed that the proportion of OSU students who belong to a fraternity or a sorority is 0.15.…

A: P value will claculated by using z table

Q: The hypotheses to be tested are : H0:pE= vs Ha:pE<pH, where pE is the proportion of engineering…

A: It is given that For engineering major, sample size n1 = 40, X1 = 20 For humanities major, sample…

Q: student decides to spin a dime and determine the proportion of times it lands on heads. The student…

A: We have given that  Sample size n = 25 Favorable cases x =17 Population proportion p =0.5

Q: Public relation companies conducted two surveys about deodorants. The first survey asked a random…

A: Solution:

Q: A telephone company claims that the service calls which they receive are equally distributed among…

A: The given table is: Days Mon Tue Wed Thu Fri Total (N) Calls 24 26 17 20…

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: If you wish to test the claim that the mean of the population is 100, the appropriate null…

A:

Q: which of the following data sampling method is most likely to represent the population from which it…

A: Solution The correct answer is Random sample. Because in the random sampling the probability of…

Q: In an independent-measures hypothesis test, if t = 0, then the following statement is correct. The…

A: In the given problem,  In an independent-measures hypothesis test, if t = 0, then we have to choose…

Q: Public relation companies conducted two surveys about deodorants. The first survey asked a random…

A: From the given information, the number of men (n) is 500.

Q: Drowning in bathtubs is a major cause of death in children less than 5 years old. A random sample of…

A: We Have to find Estimate the percent of all parents of young children who use baby bathtubs.

Q: Answer the following questions on a separate sheet of 1. It has been reported that some parents…

A: Given: Given: Number of trails (n) = 500 Number of success (x) = 350 From the standard normal table,…

Q: Public relation companies conducted two surveys about deodorants.  The first survey asked a random…

A: Solution CI=(0.1,0.3) Choose statement 'A'

Q: Suppose a researcher conducts an experiment to test a hypothesis. If she doubles her sample size,…

A: The effect size does not depend on the sample size. This shows that, increasing the sample size…

Q: In a hypothesis test for a single proportion, which of the following is assumed for the calculation…

A: In hypothesis testing for a single proportion, it is assumed that the distribution of the population…

Q: Suppose that we want to know if the population mean of GPA of male and female students (M1 and M2)…

A:

Q: What does it mean to say that we are going to use a sample to draw an inference about the…

A: A sample is considered as taking into account the whole population is impossible. For example, if I…

Q: There is a common belief that "men marry women who are younger than they are". To test this…

A: Given that  Sample size n =100 Null and alternative hypothesis  H0 and H1.

Q: Over the past few decades, public health officials have examined the link between weight concerns…

A: Hypothesis testing is used mainly to check whether an assumption made on the population is…

Q: If two samples have the same n, then the pooled variance will be the average of the two sample…

A: Statement: " If two samples have the same n, then the pooled variance will be the average of the two…

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: According to a recent study in New York, 15% of shoppers are unfairly being charged sales tax in…

A: Null and alternative hypotheses: The hypothesis which is tentatively fixed up under and tested for…

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

A:

Q: Suppose X and Y are uncorrelated random variables. Which of the following statements are true? Group…

A: Given information: X and Y are uncorrelated random variables.

Q: If you wish to test the claim that the mean of the population is 100, the appropriate null…

A: Given, Mean of the population is 100

Q: Public relation companies conducted two surveys about deodorants. The first survey asked a random…

A: Solution: Given information: n1= 500 Sample size of men n2= 550 Sample size of women p1^= 0.68…

Q: Public relation companies conducted two surveys about deodorants. The first survey asked a random…

A: According to given info  68% men are dissatisfied that means 32% are satisfied with the…

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: When conducting a right-sided hypothesis test concerning a population proportion, which of the…

A: Consider that p is the true proportion.

Q: _________ If one concludes that there is NO difference between the sample mean and the population…

A: The null hypothesis is fail to reject if one concluded that there is no difference between the…

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: Which of the following is defined by the significance level of a hypothesis test?     The…

A:

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 a hypothesis test for a single proportion, which of the following is assumed for the calculation…

A: Introduction: The P-value is defined as the probability of obtaining a test statistic value at least…

Q: College students and STDs: A recent report estimated that 25% of all college students in the United…

A: Hypothesis to be tested: H0: p = 0.25 versus Ha: p &gt; 0.25 Sample proportion: p^=xn=43150=0.2867

Q: A political pollster conducted a study to determine political party loyalty. To do so, he selected a…

A: Given Information : A political pollster conducted a study to determine political party loyalty. To…

Q: An article reports that blue eyed people earn less than brown eyed people, with these numbers:…

A: The results are statistically significant, if p-value is less than level of significance.

Q: Public relation companies conducted two surveys about deodorants.  The first survey asked a random…

A: The number men (n) is 500.

Q: Lucy Baker is analyzing demographic characteristics of two television programs, COPS (population 1)…

A: It is basically a comparison of the statistical measures of the data with one sample(population) or…

Q: Public relation companies conducted two surveys about deodorants. The first survey asked a random…

A: p1 = Proportion of men who were dissatisfied with the effectiveness of natural deodorants p2 =…

Q: Which of the following is not one of the steps for hypothesis testing?  (a) Calculating the test…

A: Correct answer is (d) Choosing a cutoff value from your population to determine how close your…

Q: an inferential statistic

A: Suppose on a sample of Montanans it is found the mean salary is equal to 30,000. we have to…

Q: Which of the following is not an assumption of the two-factor ANOVA? Group of answer choices a)The…

A: In the given problem we have to answer, Which of the following is not an assumption of the…

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.