The Canadian government is looking for some information on the public views on expanding the Canadian Parks System. In a survey of 2238 people, 1551 people had either favourable or somewhat favourable attitudes. It is important for the government to determine how accurate this information is by providing a 95% confidence interval. The would like to know the upper limit of this interval.

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Given data,     P=58%=0.58     E=7%=0.07     z-value at 95% confidence is  zc =1.98     n=?

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Given Data: n=150 x=48

Q: Suppose a consumer advocacy group wants to conduct a survey to find if the proportion of consumers…

A:

Q: what would be the 90% confidence interval of the true proportion of young adults who have received…

A: Given that sample size is n = 190 And the sample proportion is 70% = 0.7 At 90% confidence level,…

Q: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: Mrs. Voorhees claims that a Bowie knife is the most effective method of disposing rowdy campers. In…

A:

Q: The figure to the right shows the results of a survoy in which 1013 adults from Country A, 1001…

A: It was found that out of the 1013 adults from country A, 33% of the adults say national identity is…

Q: An organization advocating for health care reform has estimated the average cost for health care of…

A: Given : sample mean, x̄ = 13000  Margin of error , E = 1000

Q: Which of these facts would tell us that the pamphlet needs to be updated? If an appropriate…

A:

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: We have to find the length of confidence interval for the proportion.

Q: In one of the studies, it was found that, in a random sample of 261 married persons, 135 were…

A:

Q: When asked whether marriage is becoming obsolete, 784 out of 1978 randomly selected adults who…

A: It is given that x = 784 and n =1978.

Q: For a research, let's consider the 10-unit sample with s = 32,866 as a preliminary example. For a…

A: Given data,s=32866E=10z-value at 95% confidence is Zc=1.96n=?

Q: A study is being planned by a pharmaceutical company to estimate the proportion of customers who…

A: We have given that,  Margin of error (E) = 3% = 0.03, confidence interval = 95%  Then,  We will find…

Q: The production manager in an automobile plant is concerned with the number of cars that do not pass…

A:

Q: Two men, A and B, who usually commute to work together decide to conduct an experiment to see…

A: Let d= X (route I travel time)−(route II travel time)d=(route I travel time)− Y (route II travel…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

A: The random variable cyber bullied follows normal distribution. The sample size is 14795. The number…

Q: A company wants to know what proportion of their customers plan to repurchase their product in the…

A:

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: Solution: From the given information, n=200, p-hat is 0.30 and the confidence level is 0.90.

Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

A: We have given that,  Favorable cases (X) = 2219 and sample size   (n) = 14795. Then,  We will find…

Q: In a survey with human resources managers, 71% of respondents thought they should hire new staff…

A: Given information: Denote the population proportion of all respondents who thought that they should…

Q: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: in a survey of 2230 adults, 57% thinks that land travel through a tourist bus is much more reliable…

A: Given,sample size(n)=2230sample proportion(p^)=0.57α=1-0.95=0.05α2=0.025Z0.025=1.96       (from…

Q: A manager at ACME Equipment Sale and Rental wondered how offering a free two-year service warranty…

A:

Q: The following table shows the results of a survey in which 1017 adults from the United States, 1060…

A: (1)

Q: perimental treatments or medicines. The sample consisted of 1220 adult Internet users, and…

A: The value of z at 95% confidence level is 1.96, which can be found by using the standard normal…

Q: The figure to the right shows the results of a survey in which 999 adults from Country​ A, 1006…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: in a random sample of 800 austin automobile owners, it was found that 480 would like to see the size…

A: We have to find given ci.

Q: A survey of 200 Senior High School learners shows that they read on average 18.5 hours per week with…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval.…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

Q: A tech company believes that the percentage of residents in the town XYZ that own a cell phone is…

A: Given: p=0.70x=130n=200 The sample proportion is obtained as below: p^=xn=130200=0.65 Hypothesis:…

Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

A:

Q: The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: No. of adult respondents=1523 No. of teen respondents=501 Percentage of adults responding yes to…

Q: If there was a 95% confidence interval of say, (0.48, 0.68), about a product being preferred by…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: n 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the…

A: Given data, n=1039 x=634 sample proportion p=x/n =634/1039 =0.61   z-value at 90% confidence is…

Q: A survey of 1,000 US adults was conducted to determine whether they believe raising the minimum wage…

A: From the given information the 99% confidence interval was ( 0.443, 0.411)

Q: n a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist…

A: Given that : x = 9 n = 48

Q: The student government association at a university wants to estimate the percentage of the student…

A: Solution

Q: Trader Moe's is considering opening a Fayetteville location but their development office has learned…

A:

Q: Suppose you want to construct an 80% confidence interval for the proportion of businesses that…

A: Given:Margin of Error (E)=3.5%=0.035   For Confidence level 80%, the significance level (α) is…

Q: The Pizza Shop wanted to determine what of its customers ordered an only cheese pizza. Out of 90…

A:

Q: A local school board wants to determine the proportion of households in the district that would…

A:

Q: Give a 95​% confidence interval for the true proportion of those from their entire mailing list who…

A: Given,Sample size (n)=1,00,000No. of donotions recived (r)=4887Proportion P^=xr=48871,00,000=0.04887…

Q: A recent Gallup poll asked a random sample of 1010 Americans to respond to the statement, "If the…

A: Given,95% confidence interval for the proportion who would respond "Strongly agree" or "Agree" is…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: The formula for the sample size is as follows:

Q: A sociologist is comparing the proportion of teenage boys who receive a text message at least once…

A: The  Conditions for the Confidence interval for the difference in population proportions • Samples…

Q: Construct a 99% confidence interval for the true proportion of all car license applications that…

A: Given Information:x=25n=155c=99%=0.99

Q: 1) In a random sample of 200 Americans, 58% said they plan to spend less on their summer vacation…

A:

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Solution: 3. From the given information, confidence level is 0.90 and E=0.03.

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.