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

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

A: Given : Sample proportion = 480600 = 0.8 90% confidence interval can be calculated as, P±Zα2×P×1-Pnα…

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Given Data: n=150 x=48

Q: Why does increasing the confidence level result in a larger margin of error?

A: We know that the Margin of error is directly proportional to the test statistic's critical value,…

Q: In a survey of 1250 U.S. adults, 363 said that their favorite sport to watch is football. The 95%…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: For one of the variables construct a 80% confidence interval and conduct a hypothesis test where you…

A: The confidence interval and hypothesis testing is obtained considering the slope of the regression…

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: 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: A professor wanted to know what proportion of college students believe in ghosts. She polled 200…

A:

Q: As Senior Class President, one of your lifelong duties is overseeing the planning of your high…

A:

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

A: Given: n=600 and x=480. Then,p^=xn=480600=0.8

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: A history teacher records the SAT scores of all 87 of her students. The data is used to construct a…

A: For calculating the confidence interval, we need to satisfy the following conditions: Independence…

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 2000 adults who were asked to identify their favorite…

A: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

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: 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: Find a 95% confidence interval for the proportion of renters.

A: It is given that  Favourable cases, X = 360 Sample size, n = 600 Confidence interval = 95%

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: For a group of 45 students taking a PSDTF test, the mean heart rate was 96 beats per minute, and the…

A:

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

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: 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: 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: 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: What happens to the margin of error if you increase the confidence level?

A: We know that, Margin of error=zσn

Q: 95% confidence interval for the proportion of adults in the United States who say that their…

A:

Q: A 97% confidence interval for proportion is found to be (.221,.623) the margin of error is what

A: The 97% confidence interval for proportion is given as (0.221, 0.623)

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

A:

Q: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

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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: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

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

A:

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: 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: 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: previous election, the confidence interval for the proportion of likely voters who would vote for…

A:

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: How can you make a 95% confidence interval smaller without changing the confidence level?

A:

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: Melissa wants to estimate the proportion of adults in the U.S. who own a gun. To do so, she surveys…

A: Given information: Sample size of adults is 45, that is, n = 45. Number of adults who own a gun is…

Q: The National Research center conducted a survey of 1000 people to learn about their major…

A: Let p denotes the population proportion of adults who think computer cyber attacks is their major…

Q: In the United States, 1000 residents aged 15 or older were surveyed and 870 replied that they were…

A:

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

A: Given

Q: If the confidence interval would only contain positive values, what would be your interpretation of…

A: The true value of the parameter range is calculated using the confidence interval. If the confidence…

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.