paired t-test: (chose one or more right answers) Requires the calculation of a pooled variance Requires the calculation of a difference for each experimental unit Calculates the confidence interval by adding/subtracting the p-value Involves a single sample with two measurements on each experimental unit

paired t-test: (chose one or more right answers) Requires the calculation of a pooled variance Requires the calculation of a difference for each experimental unit Calculates the confidence interval by adding/subtracting the p-value Involves a single sample with two measurements on each experimental unit

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question:
To construct a 95% confidence interval of variance using a sample of 18 the critical values used are __________ and _____________.
Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are as follows: 1 2 3 4 5 After6days 1376 1370 1366 1381 1351 After3days 1336 1315 1353 1354 1322 construct a 99.9% confidence interval for the difference between the mean strengths of blocks cured three days and blocks cured six days. Let d represent the strength of blocks cured six days minus the strength of blocks cured three days. Use the TI-84
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