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The ship is pushed through the water using an A-36 steel propeller shaft that is 8 m long, measured from the propeller to the thrust bearing D at the engine. If it has an outer diameter of 450 mm and a wall thickness of 55 mm, determine the amount of axial contraction of the shaft when the propeller exerts a force on the shaft of 5 kN. The bearings at B and C are journal bearings.
An aptitude test is designed to measure leadership abilities of the test subjects. Suppose that the scores on the test are normally distributed with a mean of 580 and a standard deviation of 120.
The Duracells had an average lifetime of 18.67 hours (SD = 1.176 hours) while the Energizer batteries had an average lifetime of 16.83 hours (SD = 2.878 hours). Assuming the population standard deviations to be equal, what is the test statisitic a..
A private medical clinic wants to estimate the true mean annual income of its patients. If the confidence level is 95%, find the required sample size in order to meet the needs.
Find the 99% confidence interval for the population proportion.
The company has evidence that its line produces %0.9 of noncorforming items. What is the probability that an item selected for inspection is classified as defective?
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste which could range from 0 to 5
Test at .01 level of significance if mean number of number of calories for Brand A 16 oz. yogurt cups is greater than mean calories for Brand B 16 oz. yogurt cups.
a client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual
Determine the optimum solution for the problem.
a) What is the distribution and parameter(s) for N and for S?
Develop null and alternative hypotheses to help the bank determine which option would provide the best incentive to consumers.
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