A study compared demographic characteristics of people who use the Internet to book their travel arrangements and also people who do not use the Internet. Of 1132 internet users, 643 had completed college. Among the 852 non-internet users, 349 had completed college. Do users and nonusers differ significantly in the proportion of college graduates? Use a 10% level of significance. Use the rejection region approach.

Q: A researcher randomly selected 500 patients in a doctors office and found that 90% of these patients…

A: Introduction: It is required to identify the reason it would be questionable to apply the results of…

Q: In a recent survey of 47 science teachers, 32 said the school-provided textbooks were adequate. Find…

A: Survey of 47 teachers N=47 n=32 Sample proportion = (n/N)  We have to calculate  Standard error of…

Q: In a sample of 550 students, 80% prefer online resources versus printed materials. The standard…

A:

Q: A researcher decided to gather data from all 150 employees in a certain office instead of just…

A: A certain office has 150 employees. All of them are selected by a researcher to gather data from.

Q: If a hurricane was headed your way, would you evacuate? The headline of a press release states,…

A: Sample size = n = 4625 Sample proportion = p̂ = 0.32

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A:

Q: The following table reported the results of a survey on how members would prefer to receive ballots…

A: It is needed to check, whether there is association between gender and preference.   The null and…

Q: A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage…

A: Here the sample size is number of adults.

Q: A random sample of n, = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…

A: Given Information: Sample 1: Sample size n1=154 x1=11 Sample 2: n2=131 x2=7 (a) Level of…

Q: A quality analyst wants to construct a control chart for determining whether four machines, all…

A: Given:   Machine total defectives 1 23 2 15 3 29 4 13 total 80

Q: In 1949, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Given: n1=1100x1=374p1=0.34n2=1100x2=330p2=0.30

Q: In a survey of 671 subjects, each was asked how often he or she watched TV. The survey subjects were…

A: Voluntary response sampling: In voluntary response sampling, the respondents select themselves into…

Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…

A:

Q: The International Council of Shopping Centers reports that the average teenager spends $57 during a…

A: the average teenager spends $57 during a shopping mall. mall shopping expenditure for a sample of 45…

Q: A resort employs 3,500 managers and staff. To ascertain their employees' opinions of a proposed…

A: The parameter is the characteristic which is based on whole population. And the statistic is the…

Q: Explain the Representative Sample from a Population in Which the Variables Are Related?

A: The population is the area of interest for which, one want to inquire the characteristics or trend.…

Q: Twenty years ago, 46% of parents of children in high school felt it was a serious problem that high…

A:

Q: Deloitte employment survey asked a sample of human resource executives how their company planned to…

A: Since it has multiple parts , first part is answered in detail. Kindly repost for more help.

Q: how importan

A: The five steps to sampling are: Identify the population. Specify a sampling frame. Specify a…

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 35 of the…

A: There are two independent samples which are Echinacea and placebo. Both samples come from population…

Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…

A:

Q: In an exit poll of 625 scientifically and randomly selected voters, 340 expressed support for…

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Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…

A: Introduction: A population in Statistics is defined as the collection of all possible objects,…

Q: What is the sample size of adults participated in this study?

A: We have to find the sample size for the given situation.

Q: What decisions can be made on the basis of The Harris Poll survey that measures the reputations of…

A:

Q: A survey asked students at a high-school football game whether a fund for extra-curricular…

A: In this context, the survey was conducted on the students at a high-school football game whether a…

Q: Provide an original example of how one could use a one-sample t-test to evaluate the effectiveness…

A: example of how one could use a one sample t test to evaluate the effectiveness

Q: 1. A Pew Poll taken in 2010 surveyed 830 randomly selected people ages 18 – 29, and found that 166…

A:

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: an e-store that sells cell phone accessories report that 98% of its customers are satisfied with the…

A: It is given that 98% of the customers are satisfied with the speed of delivery, which is reported by…

Q: How to identify selection or participation bias in a study?

A: Selection bias is something of a mistake that happens when the researcher choose who will be…

Q: What decisions can be made on the basis of The Harris Poll survey that measures the reputations of…

A: The interval scale is a quantitative measurement and It has equal units of measurement however, zero…

Q: In a study about learning styles, researchers used a group of 64 elementary school students who…

A: Formula : CI=point estimate ± ME

Q: An automotive manufacturer wants to know the proportion of new car buyers who pref foreign cars over…

A: A sample of 897 cars; n=897 304 preferred domestic cars; x=304 α=0.05

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: Given n=850 P0=0.54 so n*P0(1-P0) = 850*0.54*(1-0.54) =211.1

Q: (a-1) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your…

A:

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…

A: Introduction: A population in Statistics is defined as the collection of all possible objects,…

Q: a radio talk show host asked listeners to respond either yes or no to the question,  is the…

A: Population: Population consists of the complete subjects or individuals of interest that are…

Q: In order to estimate the proportion of students at a small liberal arts college who watch reality TV…

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Q: Online Sales Inc. has outsourced their customer service and wants to construct a control chart for…

A: Answer :

Q: A. Since the sample sizes are both less than​ 30, it must be assumed that the samples are…

A: (a) Here the sample sizes are less than 30. so, we have to conduct a two-sample T-test  Assumptions…

Q: In a study about learning styles, researchers used a group of 64 elementary school students who…

A: In a study about learning styles, researchers used a group of 64 elementary school students who…

Q: On Sept. 21, 2015, CNBC reported the results of a phone-in survey pertaining to the potential…

A:

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

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Q: Under what circumstances would you recommend an acceptance sampling approach instead of an SPC based…

A: The acceptance sampling approach can be used instead of an SPC based approach to quality in the…

Q: Identify the appropriate test-statistic and look for the rejection region of the following situation

A: Given, Sample mean=27.3 Sample S.D=4.1 Population mean=28 n=80

Q: Suppose in a two-way ANOVA table,the total sample size N is 30, factor Ahas 3 levels, and the…

A: From the provided information, Total sample size (N) = 30 Levels of Factor A (r) = 3 The degree of…

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.