Q3 The deflection temperature under load for two different types of plastic pipe is being investigated. Two random samples of 12 pipe specimens are tested, and the deflection temperatures observed are as follows (in °F): Type-1 206 188 205 187 195 192 185 213 192 194 178 205 Type-2 177 197 206 201 180 176 185 200 197 193 198 188 a. Assuming the variances of two types are equal, do the data support the claim that the deflection temperature under load for type 1 pipe exceeds that of type 2 at 5 % level of significance? b. Check the assumption of equality of variance at 5% level of significance. c. Find the 95% confidence interval for the difference between the two means. d. Check the results obtained in part a),b) and c} using Rstudio. Write your conclusion based on the p value obtained in RStudio.
Q3 The deflection temperature under load for two different types of plastic pipe is being investigated. Two random samples of 12 pipe specimens are tested, and the deflection temperatures observed are as follows (in °F): Type-1 206 188 205 187 195 192 185 213 192 194 178 205 Type-2 177 197 206 201 180 176 185 200 197 193 198 188 a. Assuming the variances of two types are equal, do the data support the claim that the deflection temperature under load for type 1 pipe exceeds that of type 2 at 5 % level of significance? b. Check the assumption of equality of variance at 5% level of significance. c. Find the 95% confidence interval for the difference between the two means. d. Check the results obtained in part a),b) and c} using Rstudio. Write your conclusion based on the p value obtained in RStudio.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Transcribed Image Text:Q3 The deflection temperature under load for two different types of plastic pipe is being
investigated. Two random samples of 12 pipe specimens are tested, and the
deflection temperatures observed are as follows (in F):
[I
Туре-1 206
188
187
192 185
192 194
178 205
205
195
213
Турe-2
177
197
206
201
180
176
185
200
197
193
198
188
a. Assuming the variances of two types are equal, do the data support the claim
that the deflection temperature under load for type 1 pipe exceeds that of type
2 at 5 % level of significance?
b. Check the assumption of equality of variance at 5% level of significance.
c. Find the 95% confidence interval for the difference between the two means.
d. Check the results obtained in part a),b) and c} using Rstudio. Write your
conclusion based on the p value obtained in RStudio.
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