(a) 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 a b) Find a 90% confidence interval for u, - ,. Explain the meaning of the confidence interval in the context of the problem. 0.05.

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SECTION 10.2 Inferences about the Difference of Two Means µ,-,
513
X,: Rate of hay fever per 1000 population for people over 50
95
110
101
97
112
88
110
79
115
100
89
114
85 96
(Reference: National Center for Health Statistics.)
Use a calculator to verify that I 109.50, s, -15.41, x, 99.36, and
11.57.
(a) 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
S2
lower rate of hay fever? Use a = 0.05.
(b) Find a 90% confidence interval for u, - Hy. Explain the meaning of the
confidence interval in the context of the problem.
Education: Tutoring In the journal American Journal on Intellectual and
Transcribed Image Text:SECTION 10.2 Inferences about the Difference of Two Means µ,-, 513 X,: Rate of hay fever per 1000 population for people over 50 95 110 101 97 112 88 110 79 115 100 89 114 85 96 (Reference: National Center for Health Statistics.) Use a calculator to verify that I 109.50, s, -15.41, x, 99.36, and 11.57. (a) 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 S2 lower rate of hay fever? Use a = 0.05. (b) Find a 90% confidence interval for u, - Hy. Explain the meaning of the confidence interval in the context of the problem. Education: Tutoring In the journal American Journal on Intellectual and
.Explain the meaning of the
(a) Do the data indi
region is higher than that in New England? Use a =
(b) Find a 98% confidence interval for u
confidence interval in the context of the problem.
ain
0.01.
H. Explain the meaning of the
16. Medicine: Hay Fever A random sample of n.
Kansas gave the following information for people under 25 years of ace
16 communities in western
%3D
1
: Rate of hay fever per 1000 population for people under 25
x,:
120
128
92
123
112 93
98 90
127 88
125 95 125 117 97 122
14 regions in western Kansas gave the following
A random sample of n,
information for people over 50 years old:
Transcribed Image Text:.Explain the meaning of the (a) Do the data indi region is higher than that in New England? Use a = (b) Find a 98% confidence interval for u confidence interval in the context of the problem. ain 0.01. H. Explain the meaning of the 16. Medicine: Hay Fever A random sample of n. Kansas gave the following information for people under 25 years of ace 16 communities in western %3D 1 : Rate of hay fever per 1000 population for people under 25 x,: 120 128 92 123 112 93 98 90 127 88 125 95 125 117 97 122 14 regions in western Kansas gave the following A random sample of n, information for people over 50 years old:
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