An automobile dealership asks all its customers who used its service department in a given two-week period if they would recommend the service to a friend. A total of 250 customers used the service during the two-week period, and 210 said that they would recommend the service to a friend. (A) Report the sample proportion, the standard error of the sample proportion, and the margin of error for 95% confidence. (B) Are the guidelines for when to use the large-sample confidence interval for a population proportion satisfied in this setting? Explain your answer. (C) Find the 95% large-sample confidence interval for the population proportion. (D) Write a short statement explaining the meaning of you confidence interval.

Q: Isabel Myers was a pioneer in the study of personality types. According to one of her surveys, in a…

A: Solution

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A:

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Q: To determine the preference in the consumption of dairy products in a residential area, a survey is…

A:

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A: Given that  X=133 , n=624 , p=20%=0.20

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

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

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A:

Q: Identify the y-score for a 99% confidence interval if the sample size is 35.

A: We have to find critical value for given data..

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A: Given : Sample Size, n = 184 Number of successes, x = 97 confidence level,c=0.99

Q: In a recent poll, 430 people were asked if they liked dogs, and 54% said they did. Find the margin…

A: In a recent poll, 430 people were asked if they liked dogs, and 54% said they did. Find the margin…

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A: DETAILED SOLUTION IS PROVIDED BELOWExplanation:

Q: In a random sample of 250 high school students, it was found that 85.2% (213) of them later…

A:

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A: Given data, n=260 p=18.46% =0.1846 z-value at 98% confidence is Zc=2.326

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Q: What is the best estimate for the standard error of the sampling

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A: Confidence Interval: In statistics, we can say a range of values of the specified population…

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Q: Baylor University is interested in what proportion of applicants would like to enter statistics…

A: Givenn=100x=24p^=xn=24100=0.24confidence interval = 99%

Q: Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a…

A: The confidence interval for proportion can be calculated as follows:

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.