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: 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: 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: Explain in what situations you can use the z statistic to construct a confidence interval for the…

A:

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, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A: I have used Excel function = NORMSINV() for finding critical value

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: 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: A learn-to-type software program claims that it can improve your typing skills. To test the claim…

A: We make the following table for the difference from the given information  Typing Speeds (in Words…

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: 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: 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: uman resources managers, 71% of respondents felt they should hire new staff within the next three…

A: The Upper limit can be calculated as: Upper limit = Point estimate (sample proportion) + Margin of…

Q: A survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1227 males​…

A:

Q: Generally speaking, what is the difference between a confidence interval and a prediction

A:

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

A:

Q: Suppose I wanted to know the proportion of students who are paying attention in class, so I give a…

A: Confidence Interval for Proportion A confidence interval is a statistical method that denotes a…

Q: cording to a report in USAToday, more and more parents are helping ndom sample of 40 young adults…

A: The formula to construct confidence interval is, p^±Zα/2*p^(1-p^)n The formula for margin of error…

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: Several years ago, 42% 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: Given  Several years ago, 43% of parents who had children in grades K-12 were satisfied with the…

Q: 5-Seventy percent of 50 randomly selected students from college of science and engineering were…

A:

Q: Ten different families are tested for the number of gallons of water a day they use before and after…

A: From the provided information, The difference between before and after are as follow: Before…

Q: Cough and Headache At the 98% confidence level, should be nurse inform the managers that their…

A: The number of sampled patients that complained of cough and headache, n=230.The number of patients…

Q: Several years ago, 41% of parents who had children in grades K-12 were satisfied with the quality of…

A: Followings are the Explanation of the question Use the One sample Z proportion t test and its…

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

A: Given information X=360, n=600

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: 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: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

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

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

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: Several years  ago, 41 % of parents who had children in grades  K-12 were satisfied with the quality…

A: Given,n=1175x=477p^=xnp^=4771175=0.4061-p^=1-0.406=0.594α=1-0.90=0.1α2=0.05Z0.05=1.645

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…

Q: Several years​ ago, 42​% of parents who had children in grades​ K-12 were satisfied with the quality…

A: Let p be the population proportion of parents satisfied with the quality of education the students…

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

A:

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, 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: Repairs: A sample of six records for repairs of a component showed the following costs: 95, 87, 20,…

A: The sample data for six records of repairs of component is given as:We have to obtain the…

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

A: Given : n = 1035 X = 497

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.