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The two blocks A and B each have a mass of 5 kg and are suspended from parallel cords. A spring, having a stiffness of k = 60 N/mc , is attached to B and is compressed 0.3 m against A as shown. Determine the maximum angles θ and of the cords when the blocks are released from rest and the spring becomes unstretched.
mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. the results showed
The random variable x has a normal distribution with mean=30 and standard deviation=30, find the probability that x assumes a value more than two standard deviations from its mean. more than three standard deviations from the mean.
question an education study gives information on the study mode full-time or part-time of students studying for a
Find a 99.9% confidence interval for the mean weight of all bumblebee bats at the following confidence levels (two places after decimal):(______, ______)
Find the probability that a randomly selected man will be shorter than 78.1 inches. Don't forget the diagrams for (b) and (c).
the lifetimes of brakes manufactured by company a are random with density function gxbegincases frac18e-x8 amp xgt0 0
When would you use a hypothesis test for the difference in two population proportions at your place of employment, in your education, or in politics?
an electronics firm sells four models of stereo receivers three cd decks and six speaker brands.when the four types of
The hypothesis test produces a z-score of z = 2.37. Assuming that the researcher is using a two-tailed test, what decision should be made?
the national center for health statistics reports that the mean systolic blood pressure for males 3 to 44 years of age
In testing for the equality of two population variances, when the populations are normally distributed, the10% level of significance has been used. To determine the rejection region, it will be necessary to refer tothe F table corresponding to an upp..
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
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