A firm randomly samples 100 workers at its New York plant and finds that 32% of the workers say that they buy the firm's product. Calculate a 99% confidence interval estimate for the true percentage of workers who say they buy the firm's product. Please explain  Answer: (.20, .44)

Q: A survey of 540 depressed shoppers found at 32% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 540 confidence level,c=0.99 Significance level, α…

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: In each of Exercises, use the one-proportion plus-four z-interval procedure to find the required…

A:

Q: A television station surveys 200 customers and finds that 23% of customers watch the evening news.…

A: Given data n=200 p=23% confidence level=99%

Q: If a 90% confidence interval for the mean is found to be (1.25,4.75) using a sample of n=100, find…

A:

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

Q: England-based basketball team NewCastle Eagles wants to match their fans in two distinct countries.…

A:

Q: Explain the Other Types of Confidence Intervals.

A:

Q: are vegetarian is 0.078. Find the margin of error for a 99% confidence interval.

A: Here given, A researcher wishes to estimate the proportion of adults in the city of Hawalli who are…

Q: b. In the year 2000, a survey of 977 U.S. adults were asked who they felt was the greatest…

A:

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

A: The provided information is p=0.14q=1-p=1-0.14=0.86n=500E=3%=0.03p-Represents the proportion of…

Q: In one city, 59.6% of the 1500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given, Sample size=n=1500 p^=0.596 α=0.05

Q: A random sample of 360 medical doctors showed that 106 had a solo practice. As a news writer, how…

A: Obtain the percentage of medical doctors in solo practice. The percentage of medical doctors in solo…

Q: An educator wanted to look at the study habits of university students. As part of the research, data…

A: Introduction: The confidence interval at 100 (1 – α) % confidence level gives us an interval…

Q: The maker of a cell phone screen protector would like to estimate the proportion of customers who…

A: The 96% confidence interval for the true proportion of customers who file a warranty claim is (0.15,…

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: The principal of a school claims that 30% of Grade 3 pupils stay in the playground after their…

A: We have given that  Population proportion p=30%=0.30 ,sample size n=500, and alpha =0.05 Sample…

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: A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: Explain when you would use the z value or the t-value to calculate a confidence interval

A: Z value: The z value is used for finding the confidence intervals for single population proportion,…

Q: A motorcycle dealer with the "Hd" brand wants to know the percentage of students in the city "X" who…

A: We have to find confidence interval.

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

A:

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A:

Q: An ice cream shop wants to know how many customers enjoy their newest flavor. 200 randomly selected…

A:

Q: A television sports commentator wants to estimate the proportion of Americans who "follow…

A: The value of confidence level (CL) is 0.95.

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

A: Given:

Q: Of the 1,000 people, 550 people used company s's smartphone and 460 people used company a's…

A: Given: n= 1000 ,x= 550.0 At 95.0 % confidence level , z score= 1.96 Need to find confidence…

Q: A marketing study by Ford Motor Company finds that 320 of the 650 buyers of compact cars were women.…

A: Let the population proportion of women who bought compact cars be P Given:         Sample size n =…

Q: Construct a 95% confidence interval for the proportion of college students who say they own their…

A: Given : n=410 , X=155  , α=0.05 We want to find the 95% confidence interval for the proportion of…

Q: What is the lower endpoint of a 95% confidence interval for the percent of students who like online…

A: Given Level of significance ɑ=0.05, x=92, n=134

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given : n = 1000 X = 600

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

A:

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: The confidence interval was (64, 76) What was the point estimate? What was the margin of error?

A:

Q: People were surveyed worldwide, being asked the question "How important is acquiring wealth to you?…

A: The sample proportion is calculated using the formula:

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: Fatima bought a box containing 122 sweets of different colors, 19 of them in red. What is the 95%…

A: The Probability of red sweets is given by: P=19122=0.1557 The z-score for 95% confidence is given…

Q: After an advertisement campaign of polish, the manufacturers wanted to know how many of the possible…

A:

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

A: Given Information: Sample size n=1500 Sample proportion p^=0.13 Margin of error E=3%=0.03 The higher…

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

A: From the provided information, Sample size (n) = 500 Sample proportion (p̂) = 0.11

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

A: It is given that the sample size is 500.

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: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…

A:

Q: When 500 college students were surveyed, 30% said that they own their car. Construct a 95%…

A: Here we want to find the 95% confidence interval.

Q: A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: 2) It is given that the sample size n is 1200 and the number of respondents who eat vegetables (x)…

Q: A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local…

A:

Q: b. In the year 2000, a survey of 894 U.S. adults were asked who they felt was the greatest…

A: Givenn=894x=194p^=xn=194894=0.2170Confidence interval = 99%

Q: Identify the t-score for a 99% confidence interval if the sample size is 70. t = The answer isnt…

A:

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

A:

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.