What is the horizontal distance from the press box
The press box at a baseball park is 36.0 ft above the ground. A reporter in the press box looks at an angle of 13.1° below the horizontal to see second base. What is the horizontal distance from the press box to second base?
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Data from service records shows that the time to repair a certain machine is normally distributed with a mean of 50 minutes and a standard deviation of 5 mins.
An 80 kg construction worker sits down 2.0 m from the end of a 1450 kg steel beam to eat his lunch. The cable supporting the beam is rated at 15,000 N. Should the worker be worried?
Test the hypotheses at the 5% level of significance. What is the critical value? What is the calculated Z-test statistic? What are your conclusions regarding the assumption of the proportion of students that make an A in statistics? reject or not
The saturation pressure corresponding to this temperature is close to 3.6 bars. Recalculate the efficiency of for an extraction pressure of 3.5 bars.
Polonium metal crystallizes in a lattice which contains onlyone Po atom per cubic unit cell. The radius of a polonium atom is1.67 Å.
The summary statistics for sale price and living area are listed below. The correlation between sale price and living areas is 0.7855. Living area: mean=1316.3, standard deviation = 405.05 Sale price: mean=177496.4, standard deviation = 83018.28
A mass, m1 = 7.98kg is at rest on a frictionless horizontal surface and connected to a wall by a spring with k= 64.6 N/m. A second mass, m2 =4.94kg, is moving to the right at v0= 26.2 m/s. The two masses collide and stick together. a) What is the
Test the hypotheses at the 5% level of significance. What is the critical value? What is the calculated Z-test statistic? What are your conclusions regarding the assumption of the proportion of students that make an A in statistics?
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