Elvin wants to know how the school views him as their leader. He asked his friend, Marcus, to research it. After a week, Marcus told him that a sample of 400 schoolmates selected at random indicated that 58% of them hold him in high regard.

Q: A random sample of 300 college freshmen found that 112 of them own an iPhone.  Find a 95% confidence…

A: Given, Favorable Cases XX = 112112 Sample Size NN = 300300

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: For Males : The sample size , N1=70N_1 = 70 Those who said Yes ,  X1=55X_1 = 55X1​=55:…

Q: A manager needs to know the proportion of employees who have insurance. He selects 200 employees and…

A:

Q: A recent study was conducted in which a random sample of men and a random sample of women were…

A: Given:  Confidence Interval = (0.133,0.207) = (13.3%, 20.7%)

Q: A collage professor would like to estimate the proportion of students who pull an *all-nighter,"…

A: Given: n = 100 99% Confidence interval = (0.48 to 0.62) Formula Used: Confidence interval = p^ ±…

Q: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: In a recent survey, a random sample of Ohio football fans was asked to indicate whether they believe…

A:

Q: 1. In a recent poll 62 out of 149 randomly chosen students at Allen High School say they plan to buy…

A:

Q: If, based on a sample size of 850​, a political candidate finds that 479 people would vote for him…

A: Given that  n=850 , X=479 Find 95​% confidence interval for his expected proportion of the​ vote?

Q: one city, 79.6% of the 8500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given n=8500

Q: Explain why a 100% confidence interval for µ can never be constructed from a sample.  Hint:  What…

A:

Q: The management of a health insurance company wants to know the percentage of its policyholders who…

A:

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

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

A: The formula for 100(1-α)% confidence interval for population proportion is,     From the given…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Julia wonders if people living in the eastern part of her country are more likely to respond…

A: Given  n1=100 , X1=80 , n2=100 , X2=60 Zc=1.96, at alpha=0.05 Find 95% confidence interval

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given that  Sample size n =50 95 % confidence interval.  (0.25 , 0.34 )

Q: Suppose a researcher found that M= 30.00 and SEM= 3.00. What are the limits of the 68% confidence…

A:

Q: If a student provided 90% confidence intervals in all ten questions, how many points would we expect…

A: In the given analysis, we have 10 questions and their correct answers. 10 sample responses from 10…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: As we know confidence interval interpreted that we are that percent confident that it will contain…

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

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

Q: 8% of a sample of 400 foster children say they have suffered some type of abuse from their foster…

A:

Q: A scientist computes a 90% confidence interval to be (4.38, 6.02). Using the same data, she also…

A:

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that  Sample size n =120 Favorable cases x =88 Sample proportion p^=x/n  =88/120 =0.7333

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: n 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the…

A: Given, confidence level = 1 - α = 0.98       To find, Z value for 98% confidence level.

Q: The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: No. of adult respondents=1523 No. of teen respondents=501 Percentage of adults responding yes to…

Q: Yun is curious what proportion of users will click an advertisement that appears on his website. He…

A: We can use this formula to find the 99% confidence interval, p±zp1-pn

Q: If n = 220, p-hat = 0.4, then what will be the 90% Confidence Interval for the population…

A:

Q: Kit and Casey are each attempting to estimate the proportion of college students who can play at…

A: Given Information:- P(At least one musical instrument) = 0.35 Kit's confidence interval = (0.308,…

Q: Calculate a 95% confidence interval for the proportion of clients that would recommend the company

A: Concept: The sample proportion of the sample of size n can be defined as:  Here, X = Total number…

Q: Many high school students take the AP tests in different subject areas.  In 2007, of the 144,796…

A: It is given that x1=84,199, n1=144,796, x2=102,598, n2=211,693.

Q: Michelle, a student studying music, randomly sampled fellow music majors and asked whether they…

A: Given information- Confidence interval = (0.09, 0.26) We have to find margin of error. We know that-…

Q: Elvin wants to know how the school views him as their leader. He asked his friend, Marcus, to…

A: Given data, n=400 p=58% =0.58 z-value at 60% confidence is Zc=0.84

Q: A sample of n = 200 college students are asked if they believe in extraterrestrial life and 120 of…

A: Given information- Confidence level, c = 95% Sample size, n = 200 No. of students who believe in…

Q: A recent study of 750 internet users in Europe found that 35% of internet users were women. What is…

A: It is given that the study of 750 internet users in Europe found that 35% of internet users were…

Q: Eric randomly surveyed 150 adults from a certain city and asked which team in a contest they were…

A: Confidence interval gives a range of values within which the true population parameter is likely to…

Q: In a study of the nicotine patch, 21% of those who used the patch for 2 months reported no smoking…

A: Solution: It is given that, 21% of those who used the nicotine patch for 2 months reported no…

Q: At one large college, 660 out of the 1500 students surveyed said they plan to take another science…

A: Given that,   x=660,n=1500 The sample proportion is, Critical values: By using the standard normal…

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

A: We have given that  Sample size N=600 and favorable cases X=480 Sample proportion p^=X/N

Q: Siblings Mary and David are each attempting to estimate the proportion of families in their…

A: Mary confidence intervalgiven that,size(n)=50success rate ( p )= x/n = 0.1level of significance, α =…

Q: Pew Poll conducted in 2013 surveyed a random sample of 200 adult Americans and 36 of them said that…

A: Given that a random sample of 200 adult Americans and 36 of them said that they had seen a ghost.…

Q: If 390 people were asked if they liked dogs, and 82% said they did What is the margin of error of…

A: The sample size is 390, proportion is 0.82. Computation of critical value:…

Q: The 99% confidence interval for the proportion of college students that prefer to work for a large…

A: We have given that that prefer to work for a large company is Sample size n =1500 Sample proportion…

Q: A dermatologist believes that cancers of the head and neck will occur most often of the left side in…

A:

Q: The Pizza Shop wanted to determine what proportion of its customers ordered only cheese pizza. Out…

A: Given x=15 n=80

Q: A philanthropic organisation sent free mailing labels and greeting cards to a random sample of…

A:

Q: you conducted additional studies with these men and found the following: a. The RR for those who…

A: one drink per day was 1.50 (95% CI:1.32-1.67)

Q: Refer to the accompanying stayed outside and construct a 90% confidence interval as many of the mean…

A: We have, CI = xbar +/- sigma/sqrt(n)

Q: Flagstaff found 470 NAU students who drink coffee daily. Find a 95% confidence interval for the true…

A: Given

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.