industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a 0.02 margin of error at a 90% level of confidence. a) with no prior research, what sample size should you gather in order to obtain a 0.02 margin of error? Round your answer up to the nearest whole number. n=. households b) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required. Your conduct a small preliminary sample, and you obtain a sample proportion of p^= 0.18. Using this

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: The U.S. Census Bureau computed the proportion of U.S. residents who lived in each of the four…

A: Solution: Given information: k= 4  Categories  n= 80+129+209+118 = 536  total observation   α=0.05…

Q: 5. Researchers investigating whether number of people sleeping in a room affects the number of hours…

A: Given that  Fcal=0.3246 df1=3 , df2=20 Alpha=5%=0.05 ,

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: How many repair records should be sampled if GM wants the population mean number of miles driven…

A: 1. The critical value of t-distribution at 59 degrees of freedom can be obtained using the excel…

Q: An article estimated that 80 percent of students at a large public university who are Facebook users…

A: According to the given information in this question, we need to identify the correct option

Q: A newly installed automatic gate system was being tested to see if the number of failures in 1,000…

A: The data is given asTruckEntry failuresExit failures1445024053355554565656255652507455184547sample…

Q: You    want    to    test    whether    the    proportion    of    men    who    smoke    is…

A: Given that  Male  Female  Sample size (n1) = 200 Sample size (n2) = 200 Smoke (x1) = 62 Smoke…

Q: A regional government is interested in expanding the facilities of a day care center for mentally…

A: Given information: It is given that stratified sampling is used with people in the city using the…

Q: Assuming a sample size of​ 1,000 for this​ poll, construct a 90​% confidence interval for the true…

A: It is given that Sample size n = 1000 Sample proportion = 0.62 The critical value of z at 90%…

Q: Why is a sample often a better way to obtain information about a population than a census? A. A…

A: Census:- In census,we collect our survey data from entire population.   Sample :- In sample ,we…

Q: n this population data : (1, 2, 3, 4) what is the Standard Error when a sample size of 3 is drawn.

A: Here use standard error formula with finite population

Q: A food services manager wants to know if there is a relationship between gender (male or female) and…

A: 1.   It is needed to test, whether the there is a relationship between gender (male or female) and…

Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…

A: Hypothesis Testing

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: The most important advantage of experiments over observational studies is that . a confounding…

A: Experiments give better evidence of causation.

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: GM is interested is interested in learning more about customer satisfaction with the performance of…

A: Describe the descriptive statistics for the given data: Given data represents the actual number of…

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A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific community…

A: Solution: Given information: Margin of error = E= 0.01 Population proportion = p = 0.1073 Confidence…

Q: Reach out to a family member, older friend, or another professor and ask them whether they feel that…

A: Larger samples tend to be more accurate than smaller samples if the samples are chosen randomly. The…

Q: 7. Sample Reliability. Although Nielsen surveys only a few thousand households out of the millions…

A: We have to answer questions related to sampling.

Q: in waste em to have an unusually high occurrence of cancer. FBI agent Megan Reeves believes that…

A: Given Information: Consider the given data: State Cancer Cases Connecticut 268 Maine 291…

Q: “The 2011 Sleep in America® annual poll was conducted for the National Sleep Foundation by WB&A…

A: here given  The National Sleep Foundation sponsors an annual poll. In a March 2011 press release…

Q: Twittering away The Pew Internet and American Life Project asked a random sample of 2253 U.S.…

A: Given Information: Sample size n=2253 Sample proportion p^=0.19

Q: Example 11.A company engaged in selling ballpoint pens wishes to estimate the proportion of people…

A:

Q: Consider the following scenario: you want to investigate the relationship between the number of…

A: Here we want to see if there is a relationship between 'likes' on Facebook and 'number of friends'…

Q: Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population…

A: Sample of size 32 or greater is consider as large sample .

Q: should their sample size be?

A: here use solvin's formula

Q: A cigarette manufacturer claims that his cigarettes have nicotine content that does not exceed 2.0…

A:

Q: Using EXCEL, develop a 95% confidence Interval estimate for the Mean number of miles driven until…

A: 1. The 95% confidence interval is obtained by using the EXCEL(PHStat). The software procedure is…

Q: ou are a manager for a local convenience store. You want to determin proportion of your customers…

A: Given that  Margin of error =E=6.50%=0.0650 99% confidence.

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Suppose that a middle school is using two different teaching formats for their 6th grade math…

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

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the…

A: Givensample size(n)=100p^=0.47

Q: Four scenarios of statistical studies are given below. Decide which study uses a population…

A: