6. to the nearest percentage point, the margin of error for this survey is?

Q: An admissions officer is trying to estimate, with 99% confidence, the number of students that should…

A: It is given that, the confidence interval is (2,306, 3,214).

Q: What is the confidence level for the interval x±1.645 ? Vn

A:

Q: The estimated prevalence is 25%, and the desired confidence level is 95% with a margin of error of…

A: Given: p=25%=0.25α=0.05ME=9%=0.09

Q: A survey of folk music fans yields this 95% confidence interval estimate of the proportion of fans…

A: The 95% confidence interval for the requires proportion is (0.74, 0.86). So, lower confidence limit…

Q: Suppose you wanted to keep the confidence level at 90%, but you wanted to decrease the width of the…

A: The confidence interval depends on the three factors: Confidence level: The width of the confidence…

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A:

Q: Out of 500 people sampled, 390 had kids. Based on this, construct a 99% confidence interval for the…

A: Find z-critical value: For the two-tail test, Area on each tail. Area to the left of the normal…

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: one you would normally buy?" Of these users, 62% responded that they would buy the CD. CD with this…

A: Given N=704 Level of significance =0.01

Q: You are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A: Given data, n=406 x=60 Sample proportion p=xn=60406=0.1478z-value at 95% confidence is Zc=1.96

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large sample should…

A: Given information Error = 0.09 Population proportion = 0.25 Confidence level = 0.95

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

A:

Q: In a sample of 100, 40 said they preferred Pepsi to coke. A 95% confidence interval for the…

A:

Q: Everything else being equal, a population with a higher mean yields a confidence interval that is…

A: As the formula for confidence interval is: CI=X±Zsn Where: X = Mean of the data's Z = Z-value…

Q: Out of 500 people sampled, 250 had kids.The best point estimate for p is? The margin of error for a…

A: Given Information: Out of 500 people sampled, 250 had kids. n = 500, x = 250 Point estimate for…

Q: A laboratory tested 78 chicken eggs and found that the mean amount of cholesterol was 224 milligrams…

A:

Q: By means of a pilot survey, it is already known that the proportion of residents in opposition to…

A: Formula for sample size is,

Q: Out of a sample of 500 adults aged 18 to 30, 150 still lived with their parents. Based on this,…

A: We have given that,  Sample size (N) = 500 Number of favorable cases (X) = 150 Then,  We will find…

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: When 290 college students are randomly surveyed, it is found that 120 own a car. Find a 99%…

A: Given that, x=120,n=290 The sample proportion is, Critical values: By using the standard normal…

Q: A recent study indicated that 24% of women over 55 are widows. A researcher wishes to estimate with…

A:

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

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: The number of television sets coming off a production line each day is known to have a standard…

A:

Q: A company reported that 95% confidence interval for the proportion of household who already own a…

A: Z∝/2=1.96 Use Excel funtion: NORMSINV 0.025

Q: . A survey of folk music fans yields this 95% confidence interval estimate of the proportion of fans…

A: The 95% confidence interval for proportion of fans who love music of David Wilcox is 0.74 to 0.86

Q: determine the 95% confidence interval or range in an observed score of 86 if SD is 5.8 and the…

A: 95% Confidence interval is 79.4934 and 92.5066 Explanation: Data given, r=0.82 X=86 SD=5.8 Standard…

Q: The confidence interval was (77, 83) What was the point estimate? What was the margin of error?

A:

Q: A study found a confidence interval on the proportion of children that are hearing impaired was 0.04…

A: Given confidence interval is 0.04 to 0.16 i.e., p-E=0.04 -->1 p+E=0.16 -->2

Q: Cora wants to determine a 99 percent confidence interval for the true proportion p of high school…

A: Given data: Margin of error (E) = 0.01 Confidence level  = 99 % To find : The required sample size…

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: We have to find sample size..

Q: A confidence interval for the difference in the number of friends that men and women have was found…

A: The formula of the midpoint of the confidence interval formula is,

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A: Obtain the 85% confidence interval for the population proportion of Americans over 35 who smoke. The…

Q: In a poll, 51% of the people polled answered yes to the question "Are you in favor of the death…

A: Given that: p= the probability of getting a person who answered yes to the question "Are you in…

Q: To construct the confidence interval, the quantity tsm is subtracted from and added to the sample…

A: Given:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Solution: From the given information, confidence level is 0.99, p=0.25 and E=0.03.

Q: If n = 220 and X = 176, construct a 95% confidence interval for the population proportion, p. Give…

A:

Q: Tom wants to estimate the percentage of students who live more than 3 miles from the school. He…

A: Confidence interval for population proportion at 95% level                       p^± Z0.95 p^q^n…

Q: If n=550 and X = 440, construct a 90% confidence interval. Give your answers to three decimals <p<

A:

Q: A confidence interval for a population proportion p is 0.635 to 0.700. What is the margin of error?

A: We have given that confidence interval for a population proportion p is 0.635 to 0.700.

Q: A 95% confidence interval is constructed in order to estimate the proportion of adults who own an…

A:

Q: In a sample of 55 electric motors, the average efficiency (in percent) was 85 and the standard…

A: Given data, Mean(μ)=85sd (σ)=2

Q: A confidence interval has been determined  to be -6<u<6, what was the sample mean that was used to…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: In a​ poll, 37​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Given information- Margin of error, E = 5% = 0.05 Confidence level, c = 96% We have given that 37​%…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A: (a) Given that,  x=54,n=382 The sample proportion is, Critical values: By using the standard normal…

Q: Find z* for a confidence level of 83%. Give your answer to 3 decimal places.

A: We have to find z* for a confidence level of 83%

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Given: Margin of errorE=0.02 Proportion of people who polled yes p^=0.69 The z value corresponding…

Q: Suppose you are told that a 95% confidence interval for the average price of a gallon of regular…

A:

Q: A survey was conducted to determine the proportion of adults who approve of attempts to clone a…

A: Given,   Lower bound = 0.09 Upper bound = 0.13   The objective is to find the point estimate of the…

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.