(b) what sampling distribution will you use? What assump The Student's t. We assume that both population distributions are approximately normal with unknown standard deviations. The standard normal. We assume that both population distributions are approximately normal with known standard deviations. O The Student's t. We assume that both population distributions are approximately normal with known standard deviations. O The standard normal. We assume that both population distributions are approximately normal with unknown standard deviations. What is the value of the sample test statistic? (Test the difference -a Round your answer to three decimal places.) (c) Find (or estimate) the Pvalue. OPvalue > 0.250 0.125 < P-value < 0.250 0.050 < Pvalue <0.125 O 0.025

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(b) What sampling distribution will you use? what ansumptions are you making?
• The Student's t. We assume that both population distributions are approximately normal with unknown standard deviations.
O The standard normal. We assume that both population distributions are approximately normal with known standard deviations.
O The Student's t. We assume that both population distributions are approximately normal with known standard deviations.
O The standard normal. We assume that both population distributions are approximately normal with unknown standard deviations.
What is the value of the sample test statistic? (Test the difference - j2. Round your answer to three decimal places.)
(c) Find (or estimate) the P-value.
OP-value > 0.250
0.125 < P-value < 0.250
O 0.050 s P-value < 0.125
O 0.025 < P-value < 0.050
O 0.005 < Pvalue < 0.025
O P-value <0.005
Sketch the sampling distribution and show the area corresponding to the Pvalue.
Pie
Transcribed Image Text:(b) What sampling distribution will you use? what ansumptions are you making? • The Student's t. We assume that both population distributions are approximately normal with unknown standard deviations. O The standard normal. We assume that both population distributions are approximately normal with known standard deviations. O The Student's t. We assume that both population distributions are approximately normal with known standard deviations. O The standard normal. We assume that both population distributions are approximately normal with unknown standard deviations. What is the value of the sample test statistic? (Test the difference - j2. Round your answer to three decimal places.) (c) Find (or estimate) the P-value. OP-value > 0.250 0.125 < P-value < 0.250 O 0.050 s P-value < 0.125 O 0.025 < P-value < 0.050 O 0.005 < Pvalue < 0.025 O P-value <0.005 Sketch the sampling distribution and show the area corresponding to the Pvalue. Pie
A random sample of n 16 communities in western Kansas gave the following information for people under 25 years of age.
X1: Rate of hay fever per 1000 population for people under 25
99
91 119 129 92 123 112
93
125 95 125 117 97 122
127
88
A random sample of ng = 14 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
94 108 100 97 111 88 11O
79 115 100 89 114 85
96
A USE SALT
(1) Use a calculator to calculate x, S1, X, and sa. (Round your answers to four decimal places.)
S1=
x2 =
(ii) Assume that the hay fever rate in each age group has an approcimately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fevert
a 0.05.
(a) What is the level of significance?
State the null and alternate hypotheses.
OHot = H2i H: 1 P2
Transcribed Image Text:A random sample of n 16 communities in western Kansas gave the following information for people under 25 years of age. X1: Rate of hay fever per 1000 population for people under 25 99 91 119 129 92 123 112 93 125 95 125 117 97 122 127 88 A random sample of ng = 14 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 94 108 100 97 111 88 11O 79 115 100 89 114 85 96 A USE SALT (1) Use a calculator to calculate x, S1, X, and sa. (Round your answers to four decimal places.) S1= x2 = (ii) Assume that the hay fever rate in each age group has an approcimately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fevert a 0.05. (a) What is the level of significance? State the null and alternate hypotheses. OHot = H2i H: 1 P2
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