Of 43 bank customers depositing a check, 23 received some cash back.   (a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back. (Round your answers to 4 decimal places.)    The 90% confidence interval is from  to    (b) May normality of p be assumed?    Yes No

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Q: Express the confidence interval (35.8 % , 52.8 % ) in the form of p ± E.

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Q: Express the confidence interval (68 % , 79.6 % ) in the form of p + ME.

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Q: Of 41 bank customers depositing a check, 15 received some cash back.   (a) Construct a 90 percent…

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A: Given that,X =  1320N = 2000

Q: Express the confidence interval (30.6 % , 43.6 % ) in the form of p ± ME. % + %

A: Express the confidence interval (30.6% , 43.6%) in the form of p^±ME.

Q: Express the confidence interval (48.7 % , 58.5 % ) in the form of p ± E.

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Q: If n=28, a(x-bar)=36, and s=17, construct a confidence interval at a 98% confidence level. Assume…

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Q: Out of 240 sample students surveyed, 187 students are planning to take classes during the…

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Q: Express the confidence interval mathematically. Do not round answers.

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Q: A university admissions person claims that more than 70% of its students graduate within four years.…

A: Given that  A university admissions person claims that more than 70% of its students graduate within…

Q: Of 45 bank customers depositing a check, 21 received some cash back.   (a) Construct a 90 percent…

A: Solution: a. Let X be the number bank customers received some cash back and n be the sample number…

Q: Express the confidence interval (12.2 % , 30.2 % ) in the form of p ± E.

A: Given that  Confidence interval (12.2% , 30.2%) Lower limit =12.2%=0.122 Upper limit =30.2%=0.302

Q: Based on a random sample of 50 students, the 90 percent confidence interval for the mean amount of…

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A: given data, CI=0.95α=1-0.95=0.05n=504x=448p^=xn  =448504  =0.8888

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Q: Express the confidence interval (13.8 %, 20 %) in the form of p + E.

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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.