You work for a marketing firm that has a large client in the automobile 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 0.025 margin of error at a 98% level of confidence. a. With no prior research, what sample size should you gather in order to obtain a 0.025 margin of error? b. Your firm has decided that your plan is too expensive, and they wish to reduce the sample size, and you obtain a sample proportion of p=0.205 . Using this new information. What sample size should you gather in order to obtain a 0.025 margin of error?

Q: Use the appropriate statistical tables.  A recent survey showed that from a sample of 500 packages…

A: Given, A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480…

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: Lynn University wants to examine whether students display better academic performance in class…

A: There are two independent samples which are In Class GPA and Online GPA. We have to find the…

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: 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: The owner of Maumee Motors wants to study the relationship between the age of a car and its selling…

A: Given that

Q: company in this town conducted an opinion poll to examine the party's support just before the 2014…

A: The sample proportion,i.e.,the proportion of voters who intend to vote for Pírata is calculated as,…

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: Cybersecurity is a critical business issue that demands the attention of business and IT executives.…

A: Given The data is as follows: Sample proportion, p^=0.67

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: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

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: 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: sample st. dev   Point estimate =                     Margin of the Error =   Show the Formula that…

A: The point estimate can be obtained using the excel formula “=AVERAGE(A1:A28)”. From the Excel…

Q: You want to obtain a sample to estimate the percentage of college students in the U.S. that get a…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.95.

Q: Determine the minimum sample size needed if we want to estimate the population percent of students…

A:

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: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 95%…

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…

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

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: students. You want to estimate the proportion p of students who never floss with 90% confidence and…

A: It is given that Proportion p = 0.27 Margin of error E = 0.03 Level of confidence = 90% The critical…

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

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Q: 2. 10% of all college students volunteer their time. Is the percentage of college students who are…

A: As per our guidelines, we can solve only the first three subparts, Kindly repost the others for…

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: A veterinarian is interested in the habits of the dogs who come in. He wants to estimate what…

A: The objective of the question is to conduct various statistical tests and intervals based on the…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given : Mean = μ = 0.36  Level of significance = 0.05 p^ = xn    = 31118    = 0.2627

Q: what is the population? what is the sample? what is the parameter? what is the statistic?

A: Our aim is to answer the following :  what is the population?what is the sample?what is the…

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

A:

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

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:

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.