- brandon has a fish tank that can hold 38 gallons of water.
- on monday (1st day of the month) there were 38 gallons of water in the tank.
- the fish tank loses 0.75 gallons of water on every odd numbered day.
- brandon adds 0.5 gallons of water to the fish tank on days that are multiples of 3
- how much total water will brandon need to add on the last day of the month (31 days in this month) to fill the tank to 38 gallons
- show 2 different ways to solve this problem

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