y's tax collection agency reported that 93​% of individual tax returns were filed electronically in 2017. A random sample of 245 tax returns from 2018 was selected. From th

Q: A recent study of high school students shows the percentage of females and males who have at LEAST…

A: The (1-α)% confidence interval for the difference in population proportions p1-p2 is given by;…

Q: In a telephone survey of 1100 adults, 740 adults expressed concern about the future health of social…

A:

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: Given: n= 1031 ,x= 545 need to find point estimation for p.

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given data, n=152 x=101 p=x/n =0.664 The 95% CI is Zc=1.96

Q: In a survey of 2263 adults, 742 say they believe in UFOS. Construct a 95% confidence interval for…

A:

Q: A 95% confidence interval for the proportion p active voters in the municipality of Aibonito is 0.57…

A:

Q: Out of 240 sample students surveyed, 187 students are planning to take classes during the…

A: We have given that the sample size n=240 and favourable cases X=187. Sample proportion p^ = X/n.

Q: Find the margin of error for the 95% confidence interval used to estimate the population proportion.…

A: Confidence level = 95% Sample size (n) = 2440 Sample proportion (p̂) = 0.70

Q: You observe 60 customers at a coffee shop, and 82% of them tip. What is the 95% confidence interval…

A: Given : You observe 60 customers at a coffee shop, and 82% of them tip.

Q: In a clinical trial of a certain​ drug, 30 subjects experience headaches among the 221 subjects…

A: given data n = 221x = 30construct 99% ci for p.

Q: You plan to construct a 90% confidence interval for the proportion of all middle school students who…

A:

Q: The. Nielsen television ratings used a random sample of 2,000 homes and found that 45% of the homes…

A:

Q: According to Randall Financial, through April 25, 2018, 64% of companies reported profits had…

A: The proportion is 0.64, margin of error is 0.05, and confidence level is 95%. Computation of…

Q: A company wants to know what proportion of their customers plan to repurchase their product in the…

A:

Q: In a clinical trial of a certain drug, 27 subjects experience headaches among the 219 subjects…

A: From the given information,

Q: A student polls his school to see if students in the school district are for or against the new…

A: From the provided information, Sample size (n) = 395 Out of which 210 are against the new…

Q: lorry is a researcher who is curious about the proportion of students who are planning to pursue a…

A:

Q: In a recent poll, 300 people were asked if they liked dogs, and 71% said they did. Find the Margin…

A:

Q: Part a and b

A:

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

A:

Q: In a recent poll, 140 people were asked if they liked dogs, and 52% said they did. Find the Margin…

A: Given data, n=140 p=52%=0.52 z-value at 99% confidence is Zc=2.576   Margin of error(E)=?

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

A:

Q: In a recent poll, 289 people were asked if they liked dogs, and 17% said they did. Find the margin…

A: Let X be the number of people who liked dogs Given: Number of people or sample size (n) = 289…

Q: A student organization conducted a statistical study to calculate a 95% confidence interval for the…

A: Hence,

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

A: Sample size n=972 Number of successes x=577 Confidence level 99%

Q: You plan to construct a confidence interval for the population proportion p. In order to do so, you…

A: Correct answer is d. All of the above.

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: In a recent poll, 360 people were asked if they liked dogs, and 55% said they did. Find the Margin…

A: It is given that Sample size n = 360 Sample prpoprotion = 0.55 The critical value of Z at 99%…

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

A:

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: In a survey of 2000 adults in a recent year, 713 made a New Year's resolution to eat healthier.…

A: We have given that  Sample size n= 2000 Favorable cases x = 713 Sample proportion p^=x/n

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

A: We have given that in the poll, n = 1078, x = 507 Best point estimate of population proportion p =…

Q: In a survey of 1036 adults, a poll asked, "Are you worried or not worried about having enough money…

A: From the provided information, Sample size (n) = 1036 649 stated that they were worried about having…

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

A:

Q: An educator was trying to determine the effect of remote learning on middle school aged children.…

A: An educator was trying to determine the effect of remote learning onmiddle school aged children.…

Q: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

A: Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 Critical value = z* = 1.65   […

Q: In a recent poll, 540 people were asked if they liked dogs, and 28% said they did. Find the Margin…

A:

Q: Find the margin of​ error, using a​ 95% confidence​ level, for estimating the percentage of all…

A: Given:- simple random sample of 1200 young people  so, n= 1200 86% had earned a high school diploma…

Q: A national survey of 2500adult citizens of a nation found that 25​% dreaded​ Valentine's Day. The…

A: Given that sample size is n=2500. Let p denote the true population proportion of adults those…

Q: Find the margin of error for the​ 99% confidence interval used to estimate the population…

A: The random variable X follows normal distribution. The sample size is 1100. The proportion value is…

Q: Out of a 54 person sample from our fall Math-150 classes, 12.4% of the students are left-handed.…

A: Given information: n=54p^=0.124x=54×0.124x=6.696Confidence level=80%

Q: A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99%…

A: The 99% confidence interval of the population proportion is obtained below as follows:   The formula…

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

A: Given Data Sample Size, n = 992 Number of successes, x = 581.0 confidence level,c=…

Q: In a simple random sample of 1600 young people, 85% had earned a high school diploma. Complete parts…

A: a) The point estimate of population proportion is sample proportion. The point estimate is as…

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.