Confidence interval of a true mean weight
The average weight of 60 randomly chosen compact automobiles was 2620 pounds. The sample standard deviation was 430 pounds. Determine the 99.5% confidence interval of a true mean weight, m, in pounds, of the automobiles?
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When the aircraft interior is maintained at the sea level pressure, determine the size and direction of the total force acting on a cabin door which is 1.0 meters broad and 2.0 meters high?
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05. r = 0.578,
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Determine the three lowest frequencies which will not be heard by the listener. Where the listener must be positioned when all frequencies are to be heard? Employ 340m/sec for the velocity of sound.
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