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A screw jack carries a 5 kN load. It has an M50 times 4 mm thread with a mean diameter of 47.4 mm. Calculate the screw torque required to raise the load and the efficiency of the thread. Take mu = 0.25. What torque is required to lower the load?
1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of
the mean score of the first calculus exam was 81. the standard deviation was 12. find the smallest interval about the
consider the following shortest-route problem involving six cities with the distances given.path distance1 to 2 31 to 3
a. A firm uses a computer-based training module to prepare 20 machinist to use new numerically controlled lathes. The module contains a test at the end of the course; X is the number who perform satisfactorily on the test.
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
hypothesis testing of single mean.dole pineapple inc. is concerned that the 16-ounce can of sliced pineapple is being
Compute b1, slope of an OLS regression line using dollars spent as dependent variable (Y) and age as independent variable (X).
If sales invoices are automatically calculated and posted by a company's computer system, can the auditor reduce substantive tests of transactions for the accuracy objective? Why?
A special test is given to people complaining of sever headaches. if someone has a brain tumor, the test is positive with a probability of .8 (80%).
a local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. the owner of the
Suppose that in fact the blood cholesterol level of all men aged 20 to 30 is symmetric and bell shaped with mean 186 mg/dl and an unknown standard deviation.
because of high production-changeover time and costs a director of manufacturing must convince management that a
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