In an experiment involving the breaking strength of a certain type of thread used in personalflotation devices, one batch of thread was subjected to a heat treatment for 60 seconds andanother batch was treated for 120 seconds. The breaking strengths (in N) of ten threads in eachbatch were measured.60 seconds: 43, 52, 52, 58, 59, 52, 41, 52, 56, 5412 seconds: 59, 55, 59, 66, 62, 55, 57, 66, 66, 51Find a 99% confidence interval for the difference in the mean strengths between threadstreated for 60 seconds and those treated for 120 seconds. Assume that the variances for thetwo treatments are unequal.
In an experiment involving the breaking strength of a certain type of thread used in personalflotation devices, one batch of thread was subjected to a heat treatment for 60 seconds andanother batch was treated for 120 seconds. The breaking strengths (in N) of ten threads in eachbatch were measured.60 seconds: 43, 52, 52, 58, 59, 52, 41, 52, 56, 5412 seconds: 59, 55, 59, 66, 62, 55, 57, 66, 66, 51Find a 99% confidence interval for the difference in the mean strengths between threadstreated for 60 seconds and those treated for 120 seconds. Assume that the variances for thetwo treatments are unequal.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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In an experiment involving the breaking strength of a certain type of thread used in personal
flotation devices, one batch of thread was subjected to a heat treatment for 60 seconds and
another batch was treated for 120 seconds. The breaking strengths (in N) of ten threads in each
batch were measured.
60 seconds: 43, 52, 52, 58, 59, 52, 41, 52, 56, 54
12 seconds: 59, 55, 59, 66, 62, 55, 57, 66, 66, 51
Find a 99% confidence interval for the difference in the mean strengths between threads
treated for 60 seconds and those treated for 120 seconds. Assume that the variances for the
two treatments are unequal.
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