A cell phone company offers two plans to its subscribers. At the time new subscribers sign up, they are asked to provide some de
mographic information. The mean yearly income for a sample of 39 subscribers to Plan A is $55,575 with a standard deviation of $8,970. For a sample of 29 subscribers to Plan B, the mean income is $59,475 with a standard deviation of $6,942. At the .025 significance level, is it reasonable to conclude the mean income of those selecting Plan B is larger? Hint: For the calculations, assume the Plan A as the first sample.
The test statistic is ______. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
The decision is _______
the null hypothesis that the mean of Plan B is larger.
The p-value is ______
(Round your answer to 2 decimal places.)
We know that [Volume of a cone]=pi*r²*h/3 and [Volume of a half-sphere]=(4/6)*pi*r³ then h=14 in r=9 in [Volume of a cone]=pi*r²*h/3-------------> pi*9²*14/3------------> 1186.92 in³ [Volume of a half-sphere]=(4/6)*pi*r³--------->(4/6)*pi*9³------> 1526.04 in³
the volume of the prop=1186.92+1526.04--------> 2712.96 -----------> 2713 in³