Standard error of the sample mean
A sample of size 100 has a sample standard deviation of 25. What is the standard error of the sample mean? Give your answer to one decimal place.
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The p-value for a two tail test of hypothesis is 0.014. What is the p-value for the corresponding one tail test?
Evaluate the work transfer (in kJ) if (a) n = 0, (b) n = 1, (c) n = 1.4, and (d) plot a p-V diagram for each processes and show the work by shaded areas.
A test of a two-tail hypothesis rejects the null hypothesis at the 5% level of significance. What will the decision be for an appropriate one tail test at the 2.5% level of significance?
A person pulls a toboggan for a distance of 20.0 m along the snow with a rope directed 30.0° above the snow. The tension in the rope is 95.0 N. (a) How much work is done on the toboggan by the tension force?
Assume you can measure the weight of the king's crown in air, Wa, and the weight in water, Ww. Express the specific gravity of the crown as a function of these measured values.
In an ionic solution, 5.8 x 1015 positive ions with charge +2e pass to the right each second while 6.3 x 1015 negative ions with charge -e pass to the left. What are the magnitude and direction of current in the solution?
A sample of size 500 gave a sample proportion of 0.3. What is the standard error of the sample proportion? Give your answer to four decimal places.
The brakesand coasts down the grade with an acceleration in feet per second squared given by a=3.22?0.004v2, where v is the velocity in feet per second. Determine the velocity vB at the bottom B of the grade.
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