The statistical analyst of a company making car radio has proposed reorganizing the construction procedure to be more effective. He wants to estimate time to assemble the radios using the new arrangement. He is certain that population standard deviation is 32 seconds. How large a sample of workers should be to estimate the mean assembly time within 4 seconds with 95% level of confidence?

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A:

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A: From the provided information, Mean (µ) = 228 oz Standard deviation (σ) = 70 oz X~N (228, 70)

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A: Given information Standard deviation (σ) = 23 Confidence level = 0.91

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A: formula for the sample size needed to estimate a population mean is

Q: A medical researcher wants to investigate the amount of time it takes for patients' headache pain to…

A:

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A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…

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Q: Please help him by finding the standard error of the mean for these data.

A: To find the standard error of the mean.Given that,

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A:

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Q: The dean of a college wants to use the mean of a random sample to estimate the average time students…

A: Population standard deviation is 17. The z-critical value for 93% confidence interval is 1.8119…

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A: Given that   Mean, np = 0.44  Standard deviation = 0.016

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A: Given data μ = 565σ = 100normal distribution P(493<x<681) = ?

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Q: doctor wants to estimate the mean HDL cholesterol of all 20 to 29 year old females. How many…

A: Given s=11.2 E=2

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A: It is needed to find the null and alternative hypotheses.

Q: A simple random sample of 64 observations was taken from a large population.  The sample mean and…

A: Solution-: Given: n=64,x¯=320,s=120 We want to find the standard error of the sample mean=?

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A: The provided average arsenic concentration level in healthy individuals is specified to be 3.2…

Q: Suppose that 44% of all adults think that airline travel is safer than driving. An opinion poll…

A: The information provided in the question are as follows : Sample distribution of sample proportion…

Q: An educational study to be conducted requires a test score in the middle 40% range. If the…

A: Determine the range of the highest and lowest acceptable test scores that would enable a candidate…

Q: A medical researcher wants to investigate the amount of time it takes for patients' headache pain to…

A:

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A:

Q: Matthew wants to estimate the mean fat content of a pack of potato chips manufactured by UniBee…

A: Given,standard deviation(σ)=1.2margin of error(E)=0.5α=1-0.90=0.1α2=0.05Z0.05=1.645    (from…

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A: Solution:  Given information: n= 45 Sample size  x= 323    Sample mean μ= 318   Population mean σ2=…

Q: Suppose that 44% of all adults think that airline travel is safer than driving. An opinion poll…

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A: Formula  Used: Mean X = ∑FX∑F Standard deviation = ∑FX2-nX2∑F-1

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Q: S = 2722 - 16,900/7 7-1

A: The given equation is:

Q: a medical researcher wants to investigate the amount of time it takes for patients' headache pain to…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

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A: Corporate Governance: Corporate governance is the institutional framework that regulates the…

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A: Given: μ=152,σ=15 The corresponding z scores are calculated as: The probability that the time is…