several years ago 42% of parents who had children in grades k-12 were satisified with the quality of education the students recieve. A recent poll asked 1,115 parents who have children in grades k-12 if they were satisfied with the quality of education the students recieve. Of the 1,115 surveyed 462 indicated that they were satisifed. Construct a 99% confidence interval to assess whether this represents evidence that parents attitudes towards the quality of education have changed.  What is the upper and lower bound?

Q: According to a poll, 81% of California adults (409 out of 506 surveyed) feel that education is one…

A: Point estimate=0.81

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: A local news outlet reported that 56% of 600 randomly sampled Kansas residents planned to set off…

A: We have given that,  Sample proportion (p̂) = 56% = 0.56 and sample size (n) = 600 Then,  We will…

Q: Construct a 99.8% confidence interval for the proportion of women who work at home who are college…

A: Given,n=519x=165p^=xnp^=165519=0.318The point estimation for the proportion is 0.318 .

Q: What is the purpose of finding a confidence interval for a proportion?

A: A true (or population) proportion (denoted as p), by definition, is essentially determined as the…

Q: Several years ago, 53% of parents who had children in grades K-12 were satisfied with the quality of…

A: In statistical inference, there are two types of estimation,  Point estimation and Interval…

Q: Practice. Testing a vaccine for HIV. Of 8198 subjects given a placebo, 74 became infected with HIV,…

A: (a)Given that,sample one, x1 =74, n1 =8198, p1= x1/n1=0.009sample two, x2 =51, n2 =8197, p2=…

Q: have the same sample means but different confidence intervals. What are the implications for Dr.…

A: Dr. Richard's research study includes 3 fertilizers used for crop Fertilizer Mean, Crop Yield…

Q: An issue of Time Style and Design reported on a poll conducted by Schulman Ronca & Bucuvalas Public…

A: (a)given that,possible chances (x)=410size(n)=603success rate ( p )= x/n = 0.6799point of estimate =…

Q: The internal auditing staff of a local manufacturing company performs a sample audit each quarter to…

A:

Q: Several years ago, 33% of parents who had children in grades K-12 were satisfied with the quality of…

A: The formula for the confidence interval for the proportion is, Here, confidence level is 0.90. Use…

Q: Refer to the data below: To estimate the mean height of female high school juniors, you take a…

A: Given: data to find mean

Q: The General Social Survey (GSS) is a survey administered to a random sample of adult Americans by…

A: given data sample size (n) = 2500favorable outcomes (x) = 725p = proportion of customers that are…

Q: Find a 95% confidence interval for the proportion of all U.S. adults with household incomes of at…

A: We need to construct the 95%95\%confidence interval for the population proportion. We have been…

Q: A well-known brokerage firm executive claimed that at least 90% of investors are currently confident…

A: In order to determine whether the population proportion of investors who are confident of meeting…

Q: 14. Direct Mail A survey shows that 51% of adults prefer to receive advertisements through the mail.…

A: Given percent of adults prefer to receive advertisements through the mail=51%Margin of error(E)=5.2%

Q: Several years ago, 49% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: It is known that ticks in York County carry the Lyme disease.  In a representative sample of 200…

A: Let n=sample size, X=number of Carry disease. p^=x/n  X=167, n=200

Q: Suppose that a manager is interested in estimating the average amount of money customers spend in…

A: Given information 95% confidence interval is between $31.84 and $38.66 Confidence interval gives…

Q: Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The…

A: The data shows the student evaluation ratings of courses.

Q: 99% confidence interval for the proportion of the high school students who have been cyberbullied,…

A: Given that Sample size n = 14795 Number of high school students who have cyberbullied, X = 2219 The…

Q: How does the sample size and percentage of confidence influence the width of a confidence interval?

A: We have to define effect on width of C.I.

Q: ell-known brokerage firm executive claimed that at least 90% of investors are currently confident of…

A: The provided information is: Sample sizen=800 Sample proportionp^=0.88 Hypothesized…

Q: You plan to conduct a survey to find out the proportion of students who enjoy taking classes…

A: Given  The margin of error is given as m=0.02 At a 90% confidence interval, α=0.1 As the proportion…

Q: Franchise Profits. According to Franchise Business Review, over 50% of all food franchises earn a…

A: Given: Population size, n=142 Sample size, x=81 (1) Point estimate of the proportion of casual…

Q: Race and Smoking 2013 Data collected in 2013 by the behavioral Risk Factor surveillance System…

A: From the given information: p⏞1=0.147p⏞2=0.188n1=112n2=1916c=90%=0.90

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSI WHEREAS THE…

A: The given table is HEALTH ISSUE 2010 SURVEY 2020 SURVEY ATE RECOMMEND AMOUNT OF FIBROUS…

Q: 1000 randomly selected Americans were asked if they believed the minimum wage should be raised. 600…

A: Givensample size(n)=1000x=600sample proportion(p^)=xn=6001000=0.6confidence level=95%

Q: Construct a 99% confidence interval to assess whether this represents evidence that parents'…

A:

Q: A medical researcher claims that smoking can result in the wrinkled skin around the eyes. The…

A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

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: An issue of Time Style and Design reported on a poll conducted by Schulman Ronca & Bucuvalas Public…

A: (a)given that,possible chances (x)=410size(n)=603success rate ( p )= x/n = 0.6799point of estimate =…

Q: A poll asked for people's opinion on whether closing local newspapers would hurt civic life. 425 of…

A: We have given that, Favorable cases (X) = 425 and sample size (N) = 1002  Then,  We will fins the…

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

A: Given information X=360, n=600

Q: 3.1 Construct a 95% confidence interval for the proportion of South Africans who avoided fat in…

A: From given data we have : for 2010 survey sample size=n1=1250 Proportion (Avoided fat)=p^1=0.55 for…

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSES OF 1250…

A: Confidence interval are used to measure the range where the population proportion lies. It is…

Q: In a survey of 1007 parents of children ages 8 to 14, 75% say they are willing to get a second job…

A: Given information- A proportion of parents say they are willing to get a second job or part-time…

Q: The Nellie Mae organization conducts an extensive annual study of credit card usage by college…

A:

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

A: Given Data Sample Size, n = 1105 Number of successes, x = 491.0 confidence…

Q: Several years ago, 33% 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 identify null and alternative…

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.