A businessman who flies frequently from New York to Philadelphia and also from New York to Boston believes that the in-air flight times are more variable for the Philadelphia flights (despite similar average in-air flight times). He carefully records the in-air flight times (in minutes) for his next ten flights to each location, and finds the following, where y and s represent the mean and standard deviation in the flight times to each location: Destination n ȳ s
Philadelphia 10 34.5 4.5
Bostan 10 39.0 3.0

Required:
a. Can the businessman conclude at the 0.05 significance level that the standard deviation in flight times is greater for flights to Philadelphia?
b. What assumptions are needed in order for the the test in part (a) to be reasonable?

Asystem of equation is shown below 6x - 2y equals 3 . and 5x + 3y equals 4. would you solve by substitution or elimination? and why

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Cone w has a radius of 8 cm and a height of 5 cm. square pyramid x has the same base area and height as cone w. paul and manuel disagree on how the volumes of cone w and square pyramid x are related. examine their arguments. which statement explains whose argument is correct and why? paul manuel the volume of square pyramid x is equal to the volume of cone w. this can be proven by finding the base area and volume of cone w, along with the volume of square pyramid x. the base area of cone w is π(r2) = π(82) = 200.96 cm2. the volume of cone w is one third(area of base)(h) = one third third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is one third(area of base)(h) = one third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is three times the volume of cone w. this can be proven by finding the base area and volume of cone w, along with the volume of square pyramid x. the base area of cone w is π(r2) = π(82) = 200.96 cm2. the volume of cone w is one third(area of base)(h) = one third(200.96)(5) = 334.93 cm3. the volume of square pyramid x is (area of base)(h) = (200.96)(5) = 1,004.8 cm3. paul's argument is correct; manuel used the incorrect formula to find the volume of square pyramid x. paul's argument is correct; manuel used the incorrect base area to find the volume of square pyramid x. manuel's argument is correct; paul used the incorrect formula to find the volume of square pyramid x. manuel's argument is correct; paul used the incorrect base area to find the volume of square pyramid x.