You are the operations manager for an airline and you are considering a higher fare level for passengers in aiste seats. How many randomly selected air passengers must you survey? Assund the that the sample percentage is within 25 percentage points of the true population percentage Completo parts (a) and (b) below.
a. Assume that nothing is known about the percentage of passengers who prefer aisle seats
Round up to the nearest Integer)
b. Assume that a prior survey suggests that about 34% of air passengers prefer an aisle seat
Round up to the nearest integer)

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