Between April 13-14th, 2016, Rasmussen’s polling organization asked 1,000 American adults “Currently, who pays a larger share of their income in taxes—wealthy Americans or middle-class Americans?” 71% responded that middle class American pay a larger share of their income in taxes than wealthy Americans. The margin of error was +/- 3 percentage points with a 95% level of confidence. Calculate a 95% confidence interval for the percentage of all American adults who believe that middle class American pay a larger share of their income in taxes than wealthy Americans.  % to  %

Q: Isabel Myers was a pioneer in the study of personality types. According to one of her surveys, in a…

A: Solution

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: The claim is that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given claim: 50% of the parents who had children in grades K-12 were satisfied with the quality of…

Q: joint USA Today/CNN/Gallup Poll in July 2020 indicated that of 832 white adults, 46% thought…

A: Given n=832 P=0.46

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Suppose that a random sample of 142 graduate-admissions personnel was asked what role scores on…

A: Given : Random sample of 142 graduate-admissions personnel Sample size (n)=142 Let X : No. of…

Q: A survey asked senior executives at large corporations their opinions about the economic outlook for…

A:

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A: From the provided information, 39% of parents who had children in grades K-12 were satisfied with…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: In a sample of 500 Canadians, 275 say they would rather retire in the US than in Canada. Calculate…

A:

Q: The first day of baseball comes in late March, ending in October with the World Series. Does fan…

A: given that,sample one,  n1 =1001, p1= x1/n1=0.45sample two,  n2 =1001, p2= x2/n2=0.51

Q: a newspaper article stated that the us supreme court received 812 letters from around the country on…

A: To find the 95% confidence interval for the true proportion of all American adults who feel that…

Q: A survey of 1,502 Americans in January 2012 found that 86% consider the economy a "top priority" for…

A: Given n = 1502 p = 86% = 0.86 SE = 0.01

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  Several years ago, 43% of parents who had children in grades K-12 were satisfied with the…

Q: According to Thomson Financial, through January 25, 2018, the majority of companies reported profits…

A: The sample proportion of companies showed beat estimates is, p^=104162=0.6420 The sample proportion…

Q: According to a report on consumer fraud and identity theft, California had 1439 complaints of…

A: Let x denote the number of complaints of identity theft in California. x=1439 The total number of…

Q: Calculate and interpret a 95% confidence interval to estimate the true proportion of California…

A: Given information X=360, n=600

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: A new survey found that out of a random sample of 300 high school students throughout the country…

A: From the provided information, Sample size (n) = 300 83% of them still planned on taking the…

Q: Recent research commissioned by Vodafone suggests that older workers are the happiest employees (BBC…

A: Solution: Given information: n= 120 Sample size of worker  x = 68  worker feel fulfilled at work.…

Q: A survey asked senior executives at large corporations their opinions about the economic outlook for…

A:

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: From the provided information,

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given information Population proportion p = 0.46 We have given that; a recent poll asked 1,045…

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: A survey asked senior executives at large corporations their opinions about the economic outlook for…

A: From the provided information,

Q: The Minneapolis Star Tribune (August 12, 2008) reported that 73% of Americans believe that Starbucks…

A:

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: According to the given information in this question We need to find 99% confidence interval

Q: A survey commissioned by the Southern Cross Healthcare Group reported that 16% of New Zealanders…

A: 1.Suppose p is the true population proportion of people, who consume five or more servings of drinks…

Q: What is the margin of error of a 95% confidence interval for the proportion that beat profit…

A: Given that sample size n = 162 Number of beat estimates, X = 104 At 95% confidence level, the…

Q: In a survey of 1118 U.S. adults conducted in 2012 by the Financial Industry Regulatory Authority,…

A: Number of adults in the survey is n=1118 . Number of adults who said that they always pay their…

Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

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: In a random sample of 250 high school students, it was found that 85.2% (213) of them later…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given that  Sample size n =1035 Favorable cases x =497 Sample proportion p^=x/n  =497/1035 =0.4802

Q: A survey asked senior executives at large corporations their opinions about the economic outlook for…

A: The objective of this question is to calculate the 95% confidence interval for the difference…

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.