A 99% confidence interval for a population mean was reported to be 140 to 150. If population standard deviation is 10, what sample size was used in this study? Select one: a. 50 b. 22 c. 27 d. 25

Q: Question 7 x~N(9,64) Calculate the 95% confidence interval for this distribution.

A: Give Xbar~N(9,64) 95% confidence interval

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Q: Find the value of ta/2 given a. n = 37 for the 85% confidence interval for the mean b. n = 15 for…

A: a)Here,α=1-85%=1-0.85=0.15 And,The degree of freedom=n-1=37-1=36   Then, from the…

Q: If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean,…

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Q: Construct the confidence interval for the population mean mean μ.  c=0.90​, x (x-bar)=16.2​, σ=10.0…

A: The 90% confidence interval for the population mean µ is calculated as follows:

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Q: For the following paired observations,please calculate the 95% confidence interval for the…

A: Given: data A={16.51, 15.3 , 20.12 } B={11.22 , 11.77 , 13.28 } Calculate the 95% confidence…

Q: If Xbar=81​,S=20​,and n=36​,and assuming that the population is normally​ distributed, construct a…

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Q: Determine the margin of error for a confidence interval to estimate the population mean with n = 21…

A: n = 21  s​ = 12.6 confidence interval = 80%.

Q: When alpha is set to 0.01 what is the confidence level ? answer choices : 0.01 0.02 0.98 0.99

A: From the provided information, Level of significance (α) = 0.01

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Q: If X = 66, S = 16, and n = 64, and assuming that the population is normally distributed, construct a…

A: Given data: Sample mean = 66 Sample standard deviation = 16 Sample size = 64 Confidence level  = 95%…

Q: If [330, 610] is a confidence interval for the population mean. Find the margin of eror. Select one:…

A: The upper limit of the confidence interval is (U) = 610 The lower limit of the confidence interval…

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A: Given Information n =87 x =48

Q: If X 121, o =27, and n 38, construct a 95% confidence interval estimate of the population mean, u.…

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Q: C. Find the length of the confidence interval given standard deviation) 1. s = 2.36, n = 350,…

A: Given that  C) 1) s=2.36  , n=350 , 99% confidence  NOTE:- According to bartleby guidelines expert…

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Q: A bank wishes to estimate the mean credit card balance owed by its customers. The population…

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Q: If X=99​, S=7​, and n=64​, and assuming that the population is normally​ distributed, construct a…

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Q: It is always good to have as narrow a confidence interval as possible, because a C.I. is an estimate…

A: Consider the sample mean is x̅ and the margin of error is E.

Q: If X=135, a=29, and n = 34, construct a 99% confidence interval estimate of the population mean, μ.…

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Q: For a population data set, σ = 13.0 . How large a sample should be selected so that the margin of…

A: Given, As per z-distribution table, the zcrit value for 96% confidence level is obtained as 2.05.

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A: Given,sample size(n)=10sample mean(x¯)=$70standard deviation(s)=$17.50α=1-0.95=0.05α2=0.025degrees…

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A: Given: n= 72 ,x= 53 At 99.9 % confidence level , z score= 3.291 Need to find confidence interval…

Q: If X=99​, S=13​, and n=64​, and assuming that the population is normally​ distributed, construct a…

A: Mean = 99 Standard deviation = 13 Sample size = 64

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A: Sample size = n = 124 Sample number of events = x = 20 Sample proportion = p̂ = x/n = (20/124) =…

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A: Solution

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A: The 68-95-99.7% (Empirical) Rule: For a normal distribution, the empirical rule (68-95-99.7% Rule)…

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Q: Develop a 95% confidence interval for the population slope if the following regression information…

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Q: A 95% confidence interval for population proportion p is 32.4% to 47.6%, the margin of error is: О…

A: The 95% confidence interval for population proportion p is 32.4% to 47.6%.

Q: Example : In the group of 345 children surveyed, the sample mean was 11.3 and the standard deviation…

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Q: In a survey the planning value for the population proportion is P* = 0.45. How large a sample should…

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Q: for the population mean p? hg<u< hg (Round to one decimal place as needed.) Are the results between…

A: As the population standard deviation is not known, w will use t-distribution. df=n-1=181−1=180 α=0.1…

Q: If [1740, 1850] is a confidence interval for a population mean. Find the value of the point…

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Q: Find the value of ta/2 given a. 37 for the 85% confidence interval for the mean b. n = 15 for the…

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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.