9,

A random sample ofN1`16 communities in western Kansas gave the following information for people under 25 years of age.

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

101 112 112 124 103 96 116 103 124 130 128 122 116 151 91 112

A random sample of regions in western Kansas gave the following information for people over 50 years old.

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

118 86 83 102 88 94 107 89 107 111 103 9 100 107

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?

ANSWERS:

CHOOSE CORRECT ONE:

-1073

-3009

1073

3009

4200