Consider a sample of 49 football games, where 31 of them were won by the home team. Use a 0.10 significance level to test the claim that the probability that the home team wins is greater than one-half.
a.) Identify the null and alternative hypotheses for this test. Choose the correct answer below.
b.) Identify the test statistic for this hypothesis test.
c.) Identify the P-value for this hypothesis test.
d.) Determine if the information rejects H0 or fails to reject H0.
In: Statistics and Probability
After game 1 of the World Series (of baseball, a best-of-seven series), the announcers announced that over the previous 20 years, it had happened 12 times that the team that won the first game went on to win the series. They seemed to be suggesting that winning a series 60% of the time was surprisingly high. Is it? In other words, assuming that the two teams are equally likely to win a game and that the games are independent events, what is the probability that the team that won the first game wins the series?
In: Math
Oxygen is contained in a piston-cylinder system initially at a temperature of 40 oC and a pressure of 150 kPa. The piston is 1 m in diameter and initially 20 cm above the base of the cylinder. Heat is added at constant pressure until the piston has moved 30 cm, so it's now at 50 cm.
I found the mass of the system to be 0.2898 kg, and T2 = 783K.
a) Using the table of properties of oxygen as an ideal gas, calculate the heat added to the system per unit mass, in kJ/kg
b) Repeat this calculation assuming that the specific heat as a function of temperature is linear over this range of temperatures (ie, assuming the change in temperature is "small")
c) Repeat this calculation without this assumption (ie, direct integration of empirical relation)
In: Mechanical Engineering
A box of mass sits on the floor of an elevator. The area of the bottom surface of the box is 0.250 m2. When the elevator is moving upward at a constant speed of 2.00 m/s the pressure the box exerts on the floor is 981 pascal. (Note: One Pascal equals one Newton per square meter; 1 Pa = 1 N/m2). Calculate the pressure the box exerts on the floor while the elevator a. slows uniformly from an upward speed of 2.00 m/s to zero in 3.00 seconds. b. accelerates uniformly from rest to a downward speed of 2.00 m/s in 3.00 seconds. c. slows uniformly from a downward speed of 2.00 m/s to zero in 3.00 seconds. d. is moving downward at a constant speed of 2.00 m/s e. accelerates uniformly from rest to an upward speed of 2.00 m/s in 3.00 seconds f. is at rest.
In: Physics
(Programming Language: Python)
Complete the function remove number such that given a list of
integers and an integer n, the function removes every instance
of
n from the list. Remember that this function needs to modify the
list, not return a new list.
# DO NOT ADD ANY OTHER IMPORTS from typing import List
def remove_number(lst: List[int], number: int) -> None:
"""
Remove every instance of number in lst. Do this *in-place*, i.e. *modify* the list. Do NOT return a new list.
>>> lst = [1, 2, 3]
>>> remove_number(lst, 3)
>>> lst
[1, 2]
"""
pass
In: Computer Science
A piston–cylinder device contains 0.85 kg of refrigerant-134a at -10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 10°C. Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a.
In: Mechanical Engineering
Water contained in a piston-cylinder assembly as shown in the Figure below, initially at 1.5 ??? and a quality of 20%, is heated at a constant pressure until the piston hits the stops. Heating then continues until the water is saturated vapor. Show the processes of the water in series on a sketch of the ?-? diagram. For the overall process of the water, evaluate the work and heat transfer, each in ??⁄??. Kinetic and potential effects are negligible. (please show your work)
In: Civil Engineering
Java Program. Please read carefully. i need the exact same output as below. if you unable to write the code according to the question, please dont do it. thanks
To the HighArray class in the highArray.java program (Listing 2.3), add the following methods:
1. getMax() that returns the value of the highest key (value) in the array without removing it from the array, or –1 if the array is empty.
2. removeMax() that removes the item with the highest key from the array.
3. reverse() method for the HighArray class to reverse the order of elements of the array.
Sample output of HighArray class once you do the above methods:
current array items: 77 99 44 55 22 88 11 0 66 33
Can't find 35
array items after delete some values: 77 44 22 88 11 66 33
the Max is 88
the array after calling max method: 77 44 22 88 11 66 33
the array after calling remove max method: 77 44 22 11 66 33
the new max is 77
the array after calling reverse method 33 66 11 22 44 77
In: Computer Science
In: Accounting
After a trip to the store a 70.0-kg person is carrying heavy bags perpendicular to the direction of motion. How much work is being done by the person on the bags? Use the definition of work to show your result.
b) He takes a rest on a bench and leaves his bags on the ground. Sketch a free-body diagram for each of the three objects shown in the Figure.
c) Once he gets back to his apartment building he takes an elevator up. What acceleration of the elevator is necessary for his weight to increase by 10.0%?
In: Physics