How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try.   (a) If you have no preliminary estimate for p, how many business phone calls should you include in a random sample to be 80% sure that the point estimate p̂ will be within a distance of 0.04 from p? (Round your answer up to the nearest whole number.)  phone calls (b) A report states that businesspeople can be reached by a single phone call approximately 22% of the time. Using this (national) estimate for p, answer part (a). (Round your answer up to the nearest whole number.)  phone calls

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From given data we have : n=576 x=358

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From the given information, Confidence level =0.80 Margin of error =0.04

Q: digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a…

A: We have given that  Sample size n=726 Favorable cases x= 634 Sample proportion p^=x/n

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: The objective of this question is to find the point estimate for the proportion of women shoppers…

Q: (a) If you have no preliminary estimate for p, how many medical files should you include in a random…

A: For the given probleme, we need ro find the minimum number of sample size in order to be 85% sure…

Q: For this problem, carry at least 1ou digit! in your may vary In a marketing survey, a random sample…

A: It is given that n =984 and x =274.

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given: Sample size, n=5832 Number of people provided at least some charity care X = 3143 (a) Point…

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Q: In a marketing survey, a random sample of 1016 supermarket shoppers revealed that 270 always stock…

A: Sample size = n = 1016 Sample number of events = x = 270

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A: A. It is given that, 3170 of the 5967 physicians sampled provided some charity care. Thus, x= 3,170…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: We have to find confidence interval.....

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: nesspeople for which the caller reaches the person being called on the first try. Id you include in…

A: From the provided information, Confidence level = 80% Margin of error = 0.03

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Solution: A. Let X be number of supermarket shoppers who always stock up on an item when they find…

Q: Solve this for me

A: The objective of this question is to estimate the number of visitors who are actually looking for…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given,n=1020x=270α=1-0.95=0.05α2=0.025Z0.025=1.96    (from Z-table)

Q: random sample of 5643 physicians in Colorado showed that 3332 provided at least some charity care…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: The provided information are: Confidence level = 85% = 0.85 Margin of error (E) = 0.04 (a) From the…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: a)

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given,  A random sample of 5751 physicians in Colorado showed that 3008 provide at least some…

Q: What important feature is missing in the following scenario?

A: Given: The confidence interval for proportion is, (17.8% , 22.4%) The sample size = n = 1028

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 85%

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From the provided information, Sample size (n) = 5913 Out of which 3116 provided at least some…

Q: (a) Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Androld…

A: It is given that Sample size n = 245 Number of cell phone owners with Android phone, X = 106

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A: 1000 large corporations are surveyed. 242 are in favor of non smoking candidates.

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A: Hey there! Thank you for posting the question.  Since you have posted a question with multiple…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Solution: Given information: n= 984 Sample size  supermarket shopper. X= 274  stock up

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: A. It is given that, 630 of the sampled shoppers remained loyal to the supermarket out of the 728…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given,n=596x=369

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given data, n=1000 X= 256

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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A: Obtain the sample size. The formula of sample size is, Obtain the area of probability in the right…