A study of 420,015 cell phone users found that 139 of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0212​% for those not using cell phones. Complete parts​ (a) and​ (b). a. Use the sample data to construct a 90​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. %

Q: Out of 300 people sampled, 156 had kids. Based on this construct a 90% confidence interval for the…

A: X = 156 N = 300

Q: A study of 420,082 cell phone users found that 135 of them developed cancer of the brain or nervous…

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

Q: Which is the stronger level of significance, 0.01 or 0.001?   a. 0.001 This is the probability of…

A: In statistics, level of significance Is defined as the probability of making type 1 error. Type 1…

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A:

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 poll for a statewide election has a margin of error of 2.14 percentage points. How many voters…

A: From the provided information,Margin of error (E) = 0.0214Confidence level = 99%

Q: (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the…

A: Given Data Sample Size, n = 420087 Number of successes, x = 135.0 confidence…

Q: What is mean and variance of the probability distribution?

A:

Q: In a study of 200 accidents that required treatment in an emergency room, 80 occurred at work. Find…

A: Obtain the 90% confidence interval for the true proportion of accidents that occurred at work. The…

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A: Treatment group

Q: a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell…

A: Given that Sample size n = 420078 Number of cell phone user who developed cancer, X = 130 The…

Q: A study of 420,031cell phone users found that 134 of them developed cancer of the brain or nervous…

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

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A: Solution: From the given information, confidence level is 0.95, p=0.40 and E=0.03.

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A:

Q: A​ 95% confidence interval for the proportion of U.S. adults who subscribe to some sort of streaming…

A: In the above question, we are given,  a confidence interval is

Q: General Social

A:

Q: Mean Standard Deviation N Lower class 12.19 3.08 102 Working class 13.16 2.93 523 Middle class 14.60…

A: Please like my answer..... It supports me a lot...?

Q: A pharmaceutical company is running tests to see how well its new drug lowers cholesterol. Eleven…

A: From the provided information, Sample size (n) = 11 Confidence level = 95%

Q: In a survey of 7100 t.v views, 40% said they watch network news programs. Find the margin of error…

A: Solution: From the given information, p-hat=0.40 and n=7100. The confidence level is 0.95.

Q: The tobacco industry closely monitors all surveys that involve smoking. One survey showed that among…

A: given that,size(n)=785success rate ( p )= x/n = 0.183

Q: andom sample of 1200 high school freshmen was taken and it was found that 559 of them were reading…

A: The population proportion (p) will be proportion of high school freshman who reads at or above their…

Q: A survey of 20 people asked, “If you’ve ever been married, how old were you when you were first…

A:

Q: A study of 420,084 cell phone users found that 130 of them developed cancer of the brain or nervous…

A:

Q: Suppose that a safety group surveyed 800 drivers. Among those​ surveyed, 83​% said that careless or…

A: Given Information :  Suppose that a safety group surveyed 800 drivers. Among those​ surveyed, 83​%…

Q: In a sample of 1901 patients who underwent a certain type of surgery, 22% experienced complications.…

A:

Q: A study of 420,010 cell phone users found that 0.0319% of them developed cancer of the brain or…

A: Solution: Given information: n= 420010 Sample size  p^=0.0319100= 0.000319 Sample Proportion

Q: ove. 4.8 Twitter users and news, Part I: A poll conducted in 2013 found that 52% of U.S. adult…

A: Given data: P = 0.52 Confidence level    = 99% Standard error(SE) = 2.4 % To find: 99% confidence…

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A: It is given that the sample mean difference for the pretest and posttest is 11.The 90 percent…

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A:

Q: in a random sample of 192 college students, 129 had part-time jobs. Find the margin of error for the…

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Q: A doctor claims that the mean number of hours of sleep that seniors in high school get per night…

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A: Use EXCEL Procedure for mean and standard deviation for the given samples. Follow the instruction to…

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A:

Q: For the sample data set: (0,0) (2,3) (3,3) (6,4) (9,8) a. Give a point estimate for the mean value…

A: The given data set is (0, 0), (2, 3), (3, 3), (6, 4), and (9, 8).

Q: We plan to sample parents in order to construct a 99% confidence interval for the proportion who…

A:

Q: In a random sample of 100 drivers, 80 were using seat belts while driving. Construct a 95%…

A:

Q: A sanatorium conducted a study on 3,500 women over 35 years of age, of whom 220 reported having…

A: Step 1: State the given data: number of favorable cases, x = 220sample size, n = 3500confidence…

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

A:

Q: One of the hot topics in the last presidential election was with respect to our citizen's health and…

A: It is given that x is 895 and sample size is 1,046. The confidence level is 0.95.

Q: If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion

A: According to the given information, we have n = 400 X = 100 Confidence level = 99%

Q: Assume a nationwide random survey of 800 adults asked about attitudes toward “alternative medicine”…

A: We have given that,  Sample size (n) = 800 and Favorable cases (X) =448 Then,  We will find the 99%…

Q: A study of 420097 cell phone users found that 134 of them developed cancer of the brain or nervous…

A: The provided data is,

Q: Report the​ 95% confidence interval for the percentage of all young people who earned a high school…

A: From the given information, p-hat value is 0.86 and the sample size n is 1200.

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.