(a) Construct 95% confidence interval for the difference of the two proportion. Round your answer to nearest ten-thousandth.  Interpret the result.

Q: Here are summary statistics for randomly selected weights of newborn​ girls: n = 203​, x = 31.2…

A: given that,sample mean, x =31.2standard deviation, s =6.7sample size, n =203standard error = sd/…

Q: Find the value of t a/2 for a 99% confidence interval when the sample size is 30

A: Given Confidence = 99% n=30

Q: In a survey, the planning value for the population proportion is  p* = 0.33.  How large a sample…

A: It is given that the population proportion is 0.33.It is known that the critical value for 95%…

Q: In Good Cholesterol Bad Cholesterol by Roth and Streicher , data from eight fast food restaurants…

A:

Q: A sample survey finds that 30% of a sample of 880 Ohio adults said good health was the thing they…

A:

Q: Strictly speaking, what is the best interpretation of a 95% confidence interval for the mean? If…

A: In general, the 95% confidence interval interprets that there is 95% confidence that the population…

Q: It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What…

A:

Q: Researchers polled residents in Kent and Sussex counties and asked if they were in favor of…

A: Dear Student, We are allowed to solve only a question or the first 3 subparts of a question. Kindly…

Q: From a simple random sample of 400 of the 1,395 colleges in our population, it was found that…

A: Given : 1395 colleges in our population  Population Size (N) = 1395 400 colleges selected randomly…

Q: A November 2018 CBS News Poll found that 35% of its sample planned to use online retailers for most…

A: Given that, A November 2018 CBS News Poll found that 35% of its sample planned to use online…

Q: Della has over 500 songs on her mobile phone, and she wants to estimate what proportion of the songs…

A: The formula for the confidence interval is , CI=p^± Z*p^1-p^n Where,  p^=the proportion in sample…

Q: You are given the following formula - partially completed - for a confidence interval: 6±2.326*0.8.…

A: Given Confidence interval is 6±2.326*0.8It is in the form ofx±Zc*(σn)Where x=6Zc=2.326σn=0.8Margin…

Q: 3. You want to find out the percent of people who use an iPhone, so you survey 120 random adults, of…

A: Here we need to construct a 95% confidence interval for the population proportion.

Q: In a large study designed to compare the risk of cardiovascular disease (CVD)(CVD) between smokers…

A: A confidence interval is a set of values that will possibly include an unknown parameter for the…

Q: In a survey, a random sample of teenagers were asked whether they have a sibling. The resulting…

A:

Q: The sports section of the East Mule Shoe Gazette runs a weekly question that readers can answer…

A:

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large sample should…

A: Given information Error = 0.09 Population proportion = 0.25 Confidence level = 0.95

Q: Cameron and Bailey each take random samples and construct 90% confidence intervals for the…

A:

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

A: Given that Sample size n= 500  Favorable cases x=160 Sample proportion p^=x/n

Q: If n-19, ž(x-bar)-43, and s-8, construct a confidence interval at a 90% confidence level. Assume the…

A: Given: n = 19, x¯ = 43, s = 8 Confidence level = 90%

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

A:

Q: Gallup is a company that carries out daily opinion polls on a variety of topics. In a recent daily…

A: The confidence interval can be found by using the formula p±zp(1-p)n

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: In a survey, the planning value for the population proportion is p* =0.25 . How large a sample…

A: Given: p* = 0.25α=0.05MOE=0.09

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: Given :confidence level = 90% confidence interval = (0.24,0.4) p is unknown, so p=0.5 We want to…

Q: 1. A poll of 2,500 people shows that 50% approve of a smoking ban in bars and restaurants. What is…

A:

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: As we know confidence interval interpreted that we are that percent confident that it will contain…

Q: −0.04±0.12  a We are 95% confident that the difference in the sample proportions of voters in…

A: Confidence Interval CI  = [-0.16,0.08]

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: It is given that the confidence levels are 0.80 and 0.99.

Q: Suppose you constructed a 90% confidence interval for the true average GPA of California community…

A: Solution: 1. From the given information, 90% and 80% confidence interval for the true average GPA of…

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A: Obtain the 85% confidence interval for the population proportion of Americans over 35 who smoke. The…

Q: A study was conducted to determine if the percent of women who received financial aid is different…

A: a. 90% confidence interval for the differences in financial aid rates between men and women is-…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: It is given that margin of error (E) is 0.06 and the confidence level is 0.95.

Q: A pharmaceutical company proposes a new drug treatment for alleviating symptoms of PMS​…

A: Solution: Let X be the number of times a clinical trial success and n be the number of women. From…

Q: According to a study completed in 2006 by Pew Internet, 42% of all Americans had a broadband…

A: The 95% confidence interval for p is (0.439, 0.457).

Q: How effective is the flu shot?  In a control study, 94 of the 859 participants who received the…

A: Given ,  x1==94 , n1=859x2==46 , n2=923p1=x1n1=94859=0.1094p2=x2n2=46923=0.0498 α=0.05

Q: 3. In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: Given : Sample size of people (n) = 300 Let X : No. of people from sample  who said they watched…

Q: A recent survey of cell phone users indicated that 56 percent of the respondents prefer to use cell…

A: Given that 56% of the respondents prefer to use cell phones for texting rather than for making phone…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A:

Q: researcher was interested in comparing the amount of time spent watching television by women and by…

A:

Q: A philanthropic organization sent free mailing labels and greeting cards to a random sample of…

A:

Q: A psychologist is studying the effects of lack of sleep on the performance of various…

A: We have to find ci for given data.

Q: A health professional takes the temperatures of 5 patients:   99.8    98.3    96.9    98.0    98.3…

A: We have given that  A health professional takes the temperatures of 5 patients: 99.8    98.3    96.9…

Q: A random sample of accountants were asked whether they double-check their calculations on a tax…

A: Here the sample proportion is given by, p^ Therefore α level confidence interval is given by, p^ -…

Q: A researcher surveys a group of college students to determine the negative life events that they…

A: the given values are n1 = 18n2  = 16  X1 = 42X2 = 48SS1 =398SS2 = 370S21 = SS1n1-1…

Q: Aston’s Career Service wants to find out what proportion of Aston’s students work in a part-time…

A: From the given information, Population proportion = p = 60% = 0.60 Margin of error = E = 4% = 0.04…

Q: A random sample of married people were asked "would you remarry your spouse if you were given the…

A: Given information x = 127 N = 150

Q: For one NBA playoff game the actual percentage of the television viewing public who watched the game…

A: Given information: PWatching the game=24%=24100=0.24n=50

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.