Acylindrically shaped space station is rotating about the axis of the cylinder to create artificial gravity. the radius of the cylinder is 82.5 m. the moment of inertia of the station without people is 3.00 10 9 kg m2. suppose that 500 people, with an average mass of 70.0 kg each, live on this station. as they move radially from the outer surface of the cylinder toward the axis, the angular speed of the station changes. what is the maximum possible percentage change in the station’s angular speed due to the radial movement of the people?

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10