Find the minimum sample size
McDonalds Waiting Times. You want to estimate SD for the population of waiting times at McDonald's drive up windows. You want to be 95% confident that the sample SD is within 20% of SD. Find the minimum sample size. Is this sample size practical?
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Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 12 m3/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 2 kW from the compressor to its surroundings.
As part of a study of grade inflation, you want to estimate the mean GPA of all current college student in the U.S. All GPAS are to be standardized for a scale between 0 and 4.
Consider an ocean thermal energy conversion power plant in Hawaii designed to operate between temperature limits of 90°F (ocean surface). Calculate thermal efficiency (%) of the power plant.
The number of vacancies in some hypothetical metal increases by a factor of 4 when the temperature is increased from 1010 K to 1160 K.
A stone is shot from the edge of a cliff 125 m above ground level with an initial speed of 65 m/s at an angle of 37 degree below the horizontal. (a) Determine the the displacement along x direction
What are the hoop and axial stresses , when the cylinder carries an internal pressure of 10 MPa? How much does the radius of the cylinder expand due to the internal pressure?
The salespeople at Quality Motor Bikes sell up to 5 bikes a month. The probability distribution is as follows in the table below. What is the expected number of bikes sold during a month?
A charged material causes the deflection of a positively charged electroscope to increase. Does the charged material have an excess or deficiency of electrons? Explain.
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In addition to providing mental health services/referrals for students as a school social worker, what other activities sound realistic
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Problem: The findings of the Betz 30year study of temperament concluded all of the following except: