gigantic warehouse stores approximately 80 million empty aluminum beer and soda cans.​ Recently, a fire occurred at the warehouse. The smoke from the fire contaminated many of the cans with​ blackspot, rendering them unusable. A statistician was hired by the insurance company to estimate​ p, the true proportion of cans in the warehouse that were contaminated by the fire. How many aluminum cans should be randomly sampled to estimate p to within 0.02 with 95​% ​confidence? The statistician should sample (FILL IN THIS BLANK) cans to estimate the proportion that were contaminated by the fire to within 0.02

Q: A report statesb that 45% of home owners had a vegetable garden, how large a sample is needed to…

A: Answer: From the given data, population proportion (P) =45% = 0.45 Margin of error (ME) = 6% = 0.06…

Q: 60 people are  surveyed  in new  york city .Out of the  60 , 43 people have  corona  infection…

A: Given, Total no. of people surveyed=60 No. of people having corona infection=43 No. of people tested…

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: Find the Zc value for a 92% confident interval when the sample sizes 27

A:

Q: Imagine a researcher wants to determine whether parents differ from each other in their fondness for…

A: Explanation:   It is given that research asks each parent of 50 couples, It means, there are 50…

Q: Determine the sample proportion. It has been determined with 95% confidence that the proportion of…

A:

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: An electrical firm claimed that at least 85% of the parts they supplied conforms to specification. A…

A: Given : Claim : At least 85% of the parts they supplied conforms to specification.

Q: d) Show that an alternate formula for a z-interval of the population mean is: E(x – 1)² n·x2

A:

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: company in this town conducted an opinion poll to examine the party's support just before the 2014…

A: The sample proportion,i.e.,the proportion of voters who intend to vote for Pírata is calculated as,…

Q: The digital marketing specialist would like to test the claim that the percent of customers who use…

A: Formula : Test statistic

Q: A study shows that 93% of people prefer milk chocolate over dark chocolate. How large of a random…

A:

Q: A restaurant chain would like to measure the proportion of customers who are generally satisfied…

A: During a 1-week period, 147 customers were surveyed and 93% of them reported as being either…

Q: A multinational firm hired a consultant to determine if the workers in their domestic plants were…

A: Given Information : A multinational firm hired a consultant to determine if the workers in their…

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism…

A:

Q: To compare average birth weight between autistics and non-autistic school children from the same…

A: The objective is to find the appropriate test to compare average birth weight between autistic and…

Q: A report statesb that 49% of home owners had a vegetable garden, how large a sample is needed to…

A: Answer: From the given data, Population proportion (p) = 49% = 0.49 Margin of error (ME) = 8% = 0.08…

Q: A survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone. Determine a…

A: Given that, In a survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone.

Q: Harley Davidson motorcycles make up 13% of all the motorcycles registered in the United States.You…

A: Approximate distribution is normal

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: The workers at drug factory took a random sample of 800 drug tablets and found that 40 of them were…

A:

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: A newspaper infographic titled "Social Media Jeopardizing Your Job?" summarized data from a survey…

A: The following solution is provided below

Q: A Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run…

A:

Q: In 1995, it was determined that 78% of US citizens supported a ban on household aerosols.  Thinking…

A:

Q: A pharmaceutical researcher wants to determine the proportion of people who believes that branded…

A: Given that  Margin of error =E =1%=0.01 95% confidence.

Q: Please help answering this one:

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

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.