Mathematics, 26.08.2020 09:01 haileysolis5
Donna has observed that her father can control the speed of their grandfather clock by adjusting the height of the weight on the end of the pendulum. Donna thinks that the pendulum will move faster when the weight is lowered, and wants to test her idea. Donna gets a stopwatch and measures the time it takes for the pendulum to swing twenty times when the weight is moved to its lowest position. Donna begins to move the pendulum up by 1cm and continues to measure the time for 20 swings of of the pendulum. Donna records her data (see below). Position Time (seconds) 1 23.23 2 21.56 3 20.33 4 19.00 5 18.02 Questions: What is Donna's hypothesis? What is the test (independent) variable? What is the outcome (dependent) variable? What are 2 constants in her experiment?
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(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)
Answers: 2
Donna has observed that her father can control the speed of their grandfather clock by adjusting the...
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