A random sample of n 1 = 16 communities in western Kansas gave the following information for people under 25 years of age. x 1 : Rate of hay fever per 1000 population for people under 25 99 89 121 127...


A random sample ofn
1 = 16 communities in western Kansas gave the following information for people under 25 years of age.




x
1:   Rate of hay fever per 1000 population for people under 25























99891211279312311293
125951251179712212788


A random sample ofn
2 = 14 regions in western Kansas gave the following information for people over 50 years old.




x
2:   Rate of hay fever per 1000 population for people over 50





















941091009511088110
79115100891148596



(i) Use a calculator to calculate x1,s
1, x2, ands
2. (Round your answers to four decimal places.)



















x1
=

s
1
=
x2
=

s
2
=


(ii) Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fever? Use ? = 0.05.
(a) What is the level of significance?


Jun 04, 2022
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