The Consumer Reports National Research Center conducted a telephone survey of 2000adults to learn about the major economic concerns for the future (Consumer reports,January 2009). The survey results showed that 1760 of the respondents think the futurehealth of Social Security is a major economic concern.a. What is the point estimate of the population proportion of adults who think the futurehealth of Social Security is a major economic concern.b. At 90% confidence, what is the margin of error?

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: (a) The proportions are 22.2% for males and 18.7% for females, The margin of error is 3%, and…

Q: According to a Gallup poll taken on September 10th, 1998, 31% of a sample of adults thought that…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given :  E = 3% = 0.03 p1 = 0.214 p2 = 0.187 Z = 2.576 at 99% confidence

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: a) The sample size can be estimated as follows: n=ze2p(1-p)where, z = z scoree = errorp =…

Q: C) What is the margin of error?  D) What are the values of the upper and lower Confidence Intervals?…

A: Givensample size(n)=400Mean(x)=142standar deviation(σ)=8

Q: In a survey of 399 randomly selected households conducted in the U.S., it was found that 158 of the…

A: Given, The objective is to find the best point estimate of the proportion of households that have…

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: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A:

Q: An inspector took a random sample of 150 restaurants in Seattle and found that 30% in the sample…

A: a) Consider that p is the true population proportion of restaurants, which have food safety…

Q: In an October 2003 poll conducted by the Gallup organization, 684 of 1006 randomly selected adults…

A: Point estimate:The point estimate of population proportion is sample proportion.

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: Obtain the sample size of a preliminary estimate for p with 0.26. The formula of sample size is,…

Q: d. Glamour Magazine obtains sample data from readers who decide to mail in questionnaire printed in…

A: Introduction: It is required to identify the type of sampling used.

Q: During routine screening, a doctor notices that 20% of her adult patients show higher than normal…

A: Obtain the sample size of a preliminary estimate for p is 0.20 with the 95% confidence. The formula…

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A:

Q: (e) If 3 000 car owners are comprehensively insured by the Sun Insurance company, estimate, with 95%…

A: e) Given;      Mean = 356Sample Size = 256Standard deviation = 44 The formula to calculate the…

Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…

A:

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: It is given that margin of error (E) is 0.02 and the confidence level is 95%.Here,

Q: A polling agency wants to determine the percentage of voters in favour of extending tax cuts. they…

A: Given information- Margin of error, E = 2% = 0.02 Confidence level, c = 95% Since nothing is known…

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: Although Nielsen Media research determined the precise proportion of all Americans watching the…

A: Given : Nielsen Media research determined the precise proportion of all Americans watching the super…

Q: In 2010, a survey was given to 822 teenagers, aged 13 to 17, randomly selected by the allup Poll.…

A: Solution: Given information: n= 822 Sample size p^=0.84 Sample proportionq^= 1-p^=0.16 Assume level…

Q: Explain the meaning of a poll that says 55% of Americans approve of the job the president is doing,…

A: According to the given information, a poll that says 55% of Americans approve of the president's…

Q: 3. A Gallup poll conducted in 2010 found that 494 of 1050 adult Americans believe it is the…

A: Given that  Sample size n =1050 Favorable cases x =494 Sample proportion p^=x/n  =494/1050 =0.4705

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: The formula for margin of error is given as follows: E=zα/2p11-p1n+p21-p2n

Q: intended population

A: A population is the entire group that you want to draw conclusions about   Intended population:…

Q: In a Harris poll of 500 human resource professionals, 230 said that body piercings and tattoos were…

A: Here, the confidence level or level of significance is not mentioned. In general, it would be…

Q: You have been hired by a consortium of local car dealers to conduct a survey about the purchases of…

A: Given: Confidence level = 95% Margin of error = 0.03 Formula Used: n = ZαMargin of error2 p(1-p)

Q: A random telephone survey of 1,081 adults (aged 18 and older) was conducted by an online tax…

A: Explanation: a). Total number of people surveyed = 1081 Number of people those file their taxes…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

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: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

A:

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: Explain the effect on the margin of error and hence the effect on the accuracy of estimating a…

A: Effect on margin of error: If the sample size increases, then the standard error of statistic…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Percentage of level of confidence is 95%. Here, margin of error is, E=0.03.

Q: etermine what percent of pre-kindergarten children ages 3 to 5 whose mother had a bachelor's degree…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: Previously, an organization reported that teenagers spend 8.5 hours per week, on average, on the…

A: Given information: The data represents the number of hours per week teenagers spend on the phone.

Q: Better hiring info Editors of the business report inExercise 30 are willing to accept a margin of…

A: Assume that the population proportion is 0.5. It is known that the critical value for 99% confidence…

Q: how many subjects are needed to estimate the mean number of books read the previous year with six…

A: It is given that confidence level is 0.90, standard deviation is 11.3 and margin of error E is 6.

Q: Consider a Tukey multiple comparison of four population means with a family confidence level of…

A: Family confidence level: The family confidence level is the confidence that the all confidence…

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

A: Bias: Bias is the unfairness of an experiment. It is the factor that makes the result of the final…

Q: In a random sample of 500 teenagers 12 to 17 years old, it was found that 330 have regular access to…

A: A random sample of 500 teenagers 12 to 17 years old; n=500 It was found that 330 have regular access…

Q: NebNas manages the credit department for a grocery store chain in the province, and she would like…

A: From the given information, n=100x¯=101.5s=25.6μ=95 Given claim is the mean balance is different…

Q: The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age…

A: Given data Error = 0.02 Confidence level = 0.95

Q: The manager of a small supermarket chain wants to estimate the proportion of time stockclerks spend…

A: Assume that the population proportion is 0.5. It is known that the critical value for 98% confidence…

Q: A Businessweek/Harris survey asked senior executives at large corporations their opinionsabout the…

A:

Q: The registrar’s office at ACC predicts that 30% of the 6,950 spaces open in various math classes…

A:

Q: An auditor revlewed 25 oral surgery Insurance clalms from a particular surgical office, determining…

A:

Q: It is generally believed that nearsightedness affectsabout 12% of all children. A local elementary…

A: Therefore, the sampling distribution of the proportion of incoming kindergarteners is nearsighted…

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.