accidents. Task 8: a. The mean diameter of holes produced by a drilling machine bit is 4.05 mm and the standard deviation of the diameters is 0.0028 mm. For twenty holes drilled using this machine, determine, correct to the nearest whole number, how many are likely to have diameters of between (a) 4.048 and 4.0553 mm, and (b) 4.052 and 4.056 mm, assuming the diameters are normally distributed. b. Explain the concept and calculation of the confidence interval. 5 Marks 5 Marks

Q: a) Determine the mean and standard deviation of each data set. b) Determine the 95% confidence…

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A: Mean()=1262standard deviation()=118

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Q: The p-value = (Please show your answer to 4 decimal places.) The p-value is ? v Based on this, we…

A: Given data : sample size, n = 52 sample mean, x̄ = 2.13 sample standard…

Q: The diameter X in inches of a certain brand of tennis balls has normal distribution with mean μ =…

A: Given:  X ~ N(μ = 2.65,  σ 2= .0182)   Part a: Since acceptable balls have diameters between 2.62…

Q: we should use | Select an answer b. The null and alternative hypotheses would be: Ho: ?vSelect an…

A: Given data : sample size, n = 40 sample mean, x̄ = 61.8 sample standard…

Q: For a sample of 300 mass values, the mean is 120 g and the standard deviation is 10 g. Assuming a…

A: From the provided information, Sample size (n) = 300 Sample mean (x̄) = 114 Standard deviation (s) =…

Q: 1. State H, and H, for the following problem. A quality control officer claims that the standard…

A: The given claims that the standard deviation of tire pressure is not 2.3 psi.