Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, μ. The managers plan to choose a random sample of completion times and estimate μ via the sample. Assuming that the standard deviation of the population of completion times is 10.3 minutes, what is the minimum sample size needed for the managers to be 90% confident that their estimate is within 1.7minutes of μ?Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).

Q: The population mean is $ 1.587. (Round to three decimal places as needed.) Tax Rate Frequency…

A: We have given that the table Class Frequency 0.00 - 0.49 5 0.50 - 0.99 12 1.00 - 1.49 7…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 20 for the population…

A: GIVEN DATA,an IQ test mean is 100 and standard deviationis 20 for the population of normal adults…

Q: st is designed so that the mean is 100 and the standard deviation is 16 for the population of…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: The provided information are: Population standard deviation σ=4 Margin of error (E) = 0.5 Confidence…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 22 for the population…

A: Given information- Population standard deviation, σ = 22 Confidence interval = 0.90 Significance…

Q: A physics lab instructor wants to estimate the time required for physic students to complete a…

A: Given that  Standard deviation = 16 Margin of error = 5

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A:

Q: The pulse rates of 170 randomly selected adult males vary from a low of 44 bpm to a high of 124 bpm.…

A: Given, the pulse rates vary from a 44 bpm to a high of 124 bpm and the margin of error (E) is 4.

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 23 for the population…

A: Given that  Population standard deviation =23 Margin of error =E =8 95% confidence.

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A:

Q: The following table is the frequency distribution for the amount “screen time” (in hours)  had…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: Given : Margin of error, ME = 8.0 population standard deviation, σ = 12.0…

Q: A certain manufacturer makes 400 W light bulbs. Assume that these light bulbs have lifetimes that…

A: Z-test is used on a population that follows the normal distribution having independent data set.…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: Given dataσ = 1299% CI, E = 3n =?for 99% CI,P(-z<μ<z) = 0.99∴z=2.576  (∵z table)

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population…

A: We want to find sample size (n)

Q: Path: p QUESTION 5 Give the mean of the following list of student heights in inches 62 66 67 70 73

A: 5.From  the given information, the student heights are 62, 59, 66, 67, 70 and 73.

Q: The pulse rates of 177 randomly selected adult males vary from a low of 38 bpm to a high of 114…

A: Assume, X be the random variable representing the pulse rates (in bpm). n be the minimum sample…

Q: An 1Q test is designed so that the mean is 100 and the standard deviation is 21 for the population…

A: It is given that the confidence level is 0.95, the population standard deviation is 21, and the…

Q: During the busy season, it is important for the shipping manager at Ship Mundo to be able to…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: In order to estimated the annual cost of full-time employees absences due to child care issues, a…

A: a) The sample size is calculated by using the formula: The critical value for 90% confidence level…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: It is given that the confidence level is 0.90, the standard deviation is 17, and the margin of error…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A:

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 18 for the population…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 23 for the population…

A: Given information- Population standard deviation, σ = 23 Confidence interval = 0.95 Significance…

Q: calcium levels in people are normally distributed with a mean of 9.6 MG and a standard deviation of…

A: X~N( μ , ?)   μ=9.6 , ?=0.3   Z-score =( x - μ )/?

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A: Given Standard deviation=10 Margin of error=3 95% confidence level

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 21 for the population…

A: given data  normal distribution σ = 2195% ci for μE = 5n= ?

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population…

A:

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population…

A: Solution