In country​ A, the vast majority​ (90%) of companies in the chemical industry are ISO 14001 certified. The ISO 14001 is an international standard for environmental management systems. An environmental group wished to estimate the percentage of country​ B's chemical companies that are ISO 14001 certified. Of the 550 chemical companies​ sampled, 396 are certified. ​a) What proportion of the sample reported being​ certified? ​b) Create a 95​% confidence interval for the proportion of country​ B's chemical companies with ISO 14001 certification.​ (Be sure to check​ conditions.) Compare to the country A proportion.

Q: 1) A sample of 532 Peanut Butter M&M's contains 74 yellow candies; write a 95% confidence statement…

A: In this case, the confidence level is 95%. The 95% confidence interval for the proportion/percentage…

Q: A study examined the interactions in a children's museum. (Interactions by visitors to the museum…

A: Givensample size(n)=180x=86

Q: calculate the 95% confidence interval for the Presidential performance approval rating for a survey…

A: Solution: Let X be the number of people approved of the president’s performance and n be the number…

Q: 4. The World Health Organization reports that in a sample of 10,013 people globally, 9 in 31 people…

A: We know, we calculate CI for a single proportion with the formula z*=1.96 for 95%          1.645 for…

Q: The National Health and Nutrition Examination Survey is conducted each year and contains a variety…

A: There are two independent samples which are year 2003 and year 2018. Both samples come from…

Q: 1. If a test is statistically significant, then the 95% confidence interval of the difference…

A: Under hypothesis testing one have to find the evidence against the rejection of null hypothesis.

Q: A survey was conducted to determine if adults in the U.S., France, and Germany believed humans…

A: The objective of this question is to construct 99% confidence intervals for the proportion of adults…

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

A:

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: 829 adult were surveyed in one city, and 51% of them are opposed to the use of the photo-cop for…

A: Given data: n = 829 p = 0.51

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: 1) A consumer magazine polls cell-phone-users to see if they are happy with their phones and would…

A:

Q: A recent Gallop poll showed that 672 of 1019 adults nationwide think that marijuana should be…

A:

Q: A research center survey of 2,388 adults found that 1,904 had bought something online. Of these…

A: Given: n=2,388α=0.05

Q: If you aim to construct a 99% confidence interval for the percentage of high school students taking…

A: The objective of this question is to determine which sample size will result in the smallest margin…

Q: packer produces 1,200 packages of ham per shift, how many packages should the Quality Control area…

A: To find the confidence level of 95%.

Q: g to recent​ study, 160 of 480 CEOs in a certain country are extremely concerned about Cyber​…

A: (a) Total sample = 480 People who are extremely concerned about Cyber​ threats = 160 The value of z…

Q: A company building wind power generating turbines wishes to test two new models, A and B. The two…

A: Given information: Model A Model B 144.2 106.6 113.7 111.8 129.1 110.3 126.9 101.3…

Q: Health insurance: In 2008, the General Social Survey asked 182 people whether they received health…

A: Given that: Sample size, n=182 Count of successes in sample, x=60

Q: The branch manager of an outlet store​ (Store 1) of a nationwide chain of pet supply stores wants to…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Measures of Central Tendency : Suppose that to make the golf team you need to score no more than 73…

A: Solution:  Given information:  n= 5 observation.  The four game observation are  75, 75, 75 and 66.…

Q: 1.) Use the following information to construct a 90%,95%,& 99 % confidence interval: Population…

A: Given: σ = 7.70 x¯ = 111.7 n= 557 Part 1: The 90% confidence interval for population mean is…

Q: An insurance company selected a sample of 100 auto claims filed with it and investigated those…

A:

Q: Elly and Drew work together to collect data to estimate the percentage of their classmates who own a…

A: Given that Elly and Drew work together to collect the data to estimate the percentage of their…

Q: et: Confidence Intervals for Proportions 1. The paralyzed Veterans of America is a philanthropic…

A: Given : n=100000 x=4781 c=95%=0.95

Q: Calculate a two-sided 95% confidence interval for the population mean. b) In addition, predict the…

A: Given: The sample values given is as follows 24 28 27.75 27 24.25 23.5 26.25 24…

Q: A regional survey of 561 companies asked the vice president of operations how satisfied he or she was…

A:

Q: The budget director for a company is interested in comparing the daily travel expenses for the sales…

A: The provided information for the sales and audit staffs are:

Q: political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each…

A: Given that.  n=310 , Candidate A=110 , Candidate B=185 Unsure or plan to vote for another…

Q: In the past, 70% of a garage's business was with former patrons. Clarence Wade, the owner of the…

A: Solution: Given information: n= 600 Sample size  x = 432 Successes  p^=xn=432600= 0.72 Sample…

Q: b) Find a 99% confidence interval for the true percentage of flights that arrive late. c) Interpret…

A: a) Assumptions and inferences : Assumption 1: The sample size should be more than 30. Assumption 2:…

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…

Q: Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of…

A:

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.