Angela is trying to figure out the sample size for the data set she wants to collect. She is considering using a 90% or a 99% confidence level. Explain to Angela the impact the different levels will have on her sample size.

Q: A survey asked, "How important is it to you to buy products that are made in America?" Of the 600…

A: Given x=450 n=600

Q: uring an election, Kevin and Britney took a poll of 1,200 voters, and asked what the most…

A:

Q: Students at a certain college were asked if they have a car. After surveying 823 students, it was…

A: We know that a margin of error tells us how many percentage points our results will differ from the…

Q: ​(Round to three decimal places as​ needed.) Part 2 ​b) Identify the value of the margin of error E.…

A: We have given that,  X = 594 and n = 919  Then,  We will find the point estimate of p and margin of…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: It is given that: p^ (proportion of adults, who lie chocolate pie at the sample level)=11% (i..e,…

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

A:

Q: We would like to know: "What percentage of college students drink alcohol every day?" In a random…

A: Given that, N=500 X=75

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: The random variable flu follows binomial distribution. X ~ B (n, p). The sample size is 337. The…

Q: Explain in words what effect an increase in confidence level would have on the width of the…

A: Given information: The statement is given related to the effect of an increase in confidence level…

Q: A survey asked, "How important is it to you to buy products that are made in America?" Of the 600…

A: Given x=450 n=600

Q: At a large university in Conway, South Carolina, the Dean wants to know what proportion of students…

A: We have given thatn = 200x = 145Confidence level (c) = 99% = 0.99Significance level (α) = 1 - c =  1…

Q: Emilio wants to estimate the percentage of people who have a financial adviser. He surveys 350…

A: given data  n = 350 x = 76 we have to interprete 99% confidence intervl.

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: Find the critical values of these situations: a. p-test, right tail, level of significance 7.5% b.…

A: a) Here, the level of significance is 0.075 and the test is right tailed.

Q: Professor Smith loves dark chocolate, and she would like to find out the proportion of the…

A: Given Information: Sample size (n) = 850 Out of which x = 600 people chose dark chocolate.…

Q: doubling the sample size would have on the width of a one-proportion confidence interval, if the…

A: Answer:- we know that, when we increase the sample size, the width of confidence interval will…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: The formula of sample size is, Use EXCEL Procedure for finding the critical value of z.   Follow…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: You are trying to estimate the percent of people in California who have a college degree. You…

A: According to the given information in this question We need to identify that from the given…

Q: Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   A…

A: Given that  Sample size n=1002 and Favorable case x=585

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: A sample of 1,000 employees in an international company was taken to estimate the average…

A: Confidence interval of mean is given by, (X bar + - Z* sigma/√n) Where X bar is mean and sigma is…

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: ou are a manager for a local convenience store. You want to determin proportion of your customers…

A: Given that  Margin of error =E=6.50%=0.0650 99% confidence.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given data,E=4%=0.04letp=0.5z value at 95% confidence is Zc=1.96n=?

Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

A:

Q: wenty years ago, a very famous psychologist specializing in marriage counseling authored a book…

A: Solution: Given information n= 275 Sample size of couples who bought book. X= 217  stayed together…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: To find the sample size required for estimating the population proportion with a 95% confidence…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: Students at a certain college were asked if they have a car. After surveying 601 students, it was…

A:

Q: Ve want to know how many people plan on buying a cell phone this year. Determine the sample size…

A:

Q: What is the effect on a confidence interval if one decreases both sample size and the level of…

A:

Q: Sue and Javier are working on a statistics project to estimate the proportion of students at their…

A: Sample size (n)=2400 Sue select 81 sample and Javier select 64   The formula for 100(1-α)%…

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.