28. Graduation The U.S. Department of Commerce reported the results of a large-scale survey on high school graduation. Researchers contacted more than 25,000 Americans aged 24 years to see if they had finished high school; 84.9% of the 12,460 males and 88.1% of the 12,678 females indicated that they had high school diplomas. a) Are the assumptions and conditions necessary for inference satisfied? Explain. b) Create a 95% confidence interval for the difference in gradu- ation rates between males and females. c) Interpret your confidence interval. d) Does this provide strong evidence that girls are more likely than boys to complete high school? Explain.

Q: In a survey of 3153 adults aged 57 through 85​ years, it was found that 86.8​% of them used at least…

A:

Q: A recent year was randomly picked from 1985 to the present. In that year, there were 2051 Hispanic…

A: Given, x1 = 2051 n1 = 12328 x2 = 321 n2 = 2441 α = 0.1       To find, 90% confidence interval for…

Q: An accounting research firm asked 2100 accountants “Have you ever fudged the numbers before?” and…

A: The sample size is 2100 and 40% responded yes.

Q: A recent study was conducted to determine the proportion of people who have iPhones. A sample of 928…

A: The sample proportion of people who have iPhones will be: The critical value from the standard…

Q: 2. To estimate how often someone runs a red light in Cyber City, a student watched traffic for a…

A:

Q: 3.) The math department of a university surveyed 4,835 students and 2,469 of them stated that…

A: Given: Sample size of students (p) = 4835 Number of students stated statistics as their favorite…

Q: 829 adult were surveyed in one city, and 51% of them are opposed to the use of the photo-cop for…

A: Given data: n = 829 p = 0.51

Q: 1. Out of 1,500 licensed drivers, 900 admitted that they do not like to drive at night. What is the…

A: *As per company guidelines,  we are supposed to only answer 3 subparts. For next parts kindly…

Q: 318 who said yes. What proportion of the students does not read story books? Use 95% confidence…

A: We have given that  Sample size n = 1000 Favorable cases x = 318 Sample proportion p^=x/n =318/1000…

Q: A sociologist develops a test to measure attitudes about public transportation, and 25 randomly…

A: Mean = 76.2 Standard deviation = 21.4 Sample size = 25

Q: The analyst decides to test this assumption by collecting a random sample of 100 New Yorkers and…

A: The sample proportion is, p^=xn=65100=0.65 Computation of critical value:…

Q: 2. Construct a 95% confidence interval to estimate the proportion of Wingate female students that…

A: total number of female students =181 number of students who are left handed=15

Q: hen constructing a confidence interval, a larger sample will ___ the margin of error and the…

A: The confidence interval can be calculated as: Confidence Interval =x¯±z×σn=x¯±E Here, x¯=…

Q: An interactive poll found that 397 of 2,391 adults aged 18 or older have at least one tattoo. A.…

A: Given data: Sample size (n) = 2391 x = 397 adults To construct: 1.95 % confidence interval 2.98%…

Q: In a survey of 2480 golfers, 15% said they were left-handed. The survey's margin of error was 3%.…

A: Sample size(n)=2480sampl proportion(p^)=0.15Margin of error(E)=0.03

Q: In a survey of 1000 randomly selected adults in the US, participants were asked what their most…

A:

Q: Attitudes towards marriage. In a Time and CNN poll, 24% of 205 single women said they "definitely…

A:

Q: Calculate a two-sided 95% confidence interval for the population mean. b) In addition, predict the…

A: Given: The sample values given is as follows 24 28 27.75 27 24.25 23.5 26.25 24…

Q: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25 create and…

A: Given,   Sample size = 550 Sample proportion = 0.64   Critical value: Using z-table, the z-critical…

Q: The table shows the results of a survey in which separate samples of 400 adults each from the East,…

A: Given : n = 400 p̂= 0.26

Q: Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of…

A:

Q: According to a Field Poll conducted February 8 – 17, 2005, 79% of California adults (actual results…

A: Obtain the 90% confidence interval for the true proportion of California adults who feel that…

Q: You want to estimate the average difference in the number of complaints filed by women at work and…

A: 90% confidence interval for the average difference of two samples  90% CI = (x¯1-…

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.