In a survey of 1200 workers, 35% said they eat at home during a typical work week. What is the margin of error?

Q: Explain what happens when finding the margin of error if all stays the same except the sample size…

A: Solution: The margin of error can be calculated by using the formula:

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

A:

Q: 2. A birthday party host planned for 20 people, but 17 actually attended. What is the percent error?

A: Given that a birthday party host planned for 20 people, but 17 actually attend. From these data it…

Q: Out of 300 students in the school, 225 passed an exam. What would be the mean of the sampling…

A:

Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A: There are 153 out of 360 (n) elementary school children found as above grade level readers. The…

Q: legally purchase alcohol in the State of Oregon (students who are 21 or over). If we want the margin…

A: Given that  Margin of error =E =5% =0.05 90% confidence interval.  NOTE:- According to bartleby…

Q: A software engineering firm began stocking flavored sparkling water in addition to soda in the break…

A: Given data, n=180 x=45 sample proportion (p)=x/n= 45/180= 0.25   The z value at 95% confidence is…

Q: In a recent poll, 130 people were asked if they liked dogs, and 19% said they did. Find the margin…

A: Find z-critical value:…

Q: How smart is your phone? A random sample of 10 Samsung Galaxy smartphones being sold over the…

A: We have given that,  The data set is,  199, 169, 385, 329, 269, 149, 135, 249, 299, 249 standard…

Q: What is the Margin of Error, E?

A: Since the sample size is small and population SD is unknown then we will use critical value based on…

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: In a survey of 1009 parents of children ages​ 8-14, 74​% say they are willing to get a second or​…

A: Given n=1009 P=74%=0.74 E=2%=0.02

Q: In order to estimate the attendance at a 1,000,000 square foot mall, a sample of people is taken in…

A: We will solve the problem

Q: A report says that the average amount of time a 10-year-old American child spends playing outdoors…

A: A report says that the average amount of time a 10-year-old American child spends playing outdoors…

Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

A:

Q: A research report from an independent-measures study states that there are significant differences…

A: It is given that the numerator (treatments) degrees of freedom is 2 and the denominator (error)…

Q: A random sample of 2,000 driver's license applications found that 17% reported their eye color as…

A: Solution: Given information: n= 2000 Sample size  p^= 0.17 Sample proportion Assumed Confidence…

Q: Is it possible to provide a meaningful interpretation of the estimate b0?

A: The independent variables are 'weekly income x1' and 'family sizex2' and the dependent variable (y)…

Q: Based on the sample, predict the number of adults in Palm City whose main source of news is…

A: In sample, number of adults whose main source of news is newspaper, X = 54 Sample size n =…

Q: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: What is the margin of error for a poll with a sample size of 450 people? Round your answer to the…

A:

Q: What is Margin of Error?

A: Margin of error: The margin of error is defined as a statistic that gives the amount of sampling…

Q: estimate the sample size for a population of 750 people.

A: To estimate the sample size the required calculation can be defined by the formula  Slovin's…

Q: If the proportion of Heads is .45 out of 200 flips, what is the p-value?

A: The proportion of Heads is .45 out of 200 flips.

Q: I want to be sure to obtain a margin of error of ±5 % in a poll asking whether people support…

A: Given information: Margin of Error=+/-5%=0.05 Let level of significance=0.05 Let the proportion of…

Q: What is the value of the standard score for the sample proportion?

A: If mean if the proportion us P And standard deviation is √(pq/n) Then standard score or Z score for…

Q: A November 2018 Gallup Poll of 1075 U.S. adults found that 627 are satisfied with the total cost…

A:

Q: a pollster plans to improve survey results by only conducting polls in which the margin of error is…

A:

Q: In a Harris poll of 500 human resource professionals, 230 said that body piercings and tattoos were…

A: Here, the confidence level or level of significance is not mentioned. In general, it would be…

Q: Does it make sense ? Why or why not? A pollster plans to improve survey results by only conducting…

A: A pollster plans to improve survey results by conducting polls in which the margin of error is zero.

Q: Find the margin of error and the sample mean ( 7.14,9.50)

A:

Q: Determine the statistical relationship between the average answer time (seconds) and the average…

A: Simple linear regression model: A simple linear regression model is given as y = b0 + bx, where y is…

Q: What is the margin of error for a poll with a sample size of 2000 people? Round your answer to the…

A:

Q: In a survey of 3121 people, 412 are under-vaccinated. What is the proportion of under-vaccinated…

A: Given data, Total no of people n=3121 No of people under vaccinated is x=412 What is the proportion…

Q: A quality control officer in a food processing factory selects every 20th jar of pickles from the…

A: In the above question food processing factory selects every 20th jar of pickles from the conveyor…

Q: What is the margin of error for a poll with a sample size of 1450 people? If you round the answer to…

A: We know that   Margin of error  for a pole with n people is given by   Margin of error=±100n

Q: If 471 households were surveyed out of which 385 households have internet fiber cable, what is the…

A: Among 471 households 385 households have internet fiber cable, therefore 471-385 = 86 households…

Q: If there are six groups being compared, how many mean comparisons will there be?

A: Given there are six groups.Here, it is required to find the total number of comparisons.

Q: A researcher plans to conduct a survey. If the population on High City is 1,000,000 find the sample…

A: To calculate the sample size (n) given the population size (N) and a margin of error (e), we use…

Q: a) What proportion of workers answered yes to the survey? b) What was the margin of error?

A: Here, the 95% confidence interval for the proportion of workers that answered 'yes' is (0.62, 0.73).…

Q: Online surveys have become common due to the ease of distribution. Discuss how random Internet-based…

A: 1. Online or internet-based surveys have become very popular. The reasons behind the popularity are…

Q: A die with six sides is rolled three times. What is the chance that the ace (single dot) comes up…

A:

Q: (d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be…

A: As asked by you I have answered the question (d) and (e). Please find the explanation below. Thank…

Q: 1. In your study, the population size is 10,000. What is the size of your sample if you allow 2%…

A: here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION    here given population size  N =…

Q: What does the margin of error for the estimate of a population proportion tell you?

A: The formula for margin of error can be written as:

Q: What is the sample proportion

A: Claim: More than half of the population believes that passwords should be replaced with biometric…

Q: what is the probability of flipping a coin 112 times and getting heads 3 times? round your answer to…

A:

Q: A researcher plan to conduct a survey about how capable the students are in conducting research. If…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: time a 10-year-old American child spends playing outdoors per day is between 19.28 and 24.08…

A: Given Data Lower limit = 19.28 upper limit = 24.08

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.