An educational researcher devised a wooden toy assembly project to test learning in 6-year-olds. The time in seconds to assemble the project was noted, and the toy was disassembled out of the child’s sight. Then the child was given the task to repeat. The researcher would conclude that learning occurred if the mean of the second assembly times was less than the mean of the first assembly times. Find the 99% confidence interval for the difference in means. Child 1 2 3 4 5 6 7 Trial 1 108 140 154 115 130 111 108 Trial 2 99 118 154 96 107 102 110 Group of answer choices -0.7 < μ1 - μ2 < 23.5 -2.9 < μ1 - μ2 < 25.7 2.9 < μ1 - μ2 < 25.7 0.7 < μ1 - μ2 < 23.5

An educational researcher devised a wooden toy assembly project to test learning in 6-year-olds. The time in seconds to assemble the project was noted, and the toy was disassembled out of the child’s sight. Then the child was given the task to repeat. The researcher would conclude that learning occurred if the mean of the second assembly times was less than the mean of the first assembly times. Find the 99% confidence interval for the difference in means. Child 1 2 3 4 5 6 7 Trial 1 108 140 154 115 130 111 108 Trial 2 99 118 154 96 107 102 110 Group of answer choices -0.7 < μ1 - μ2 < 23.5 -2.9 < μ1 - μ2 < 25.7 2.9 < μ1 - μ2 < 25.7 0.7 < μ1 - μ2 < 23.5

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

See similar textbooks

Child	1	2	3	4	5	6	7
Trial 1	108	140	154	115	130	111	108
Trial 2	99	118	154	96	107	102	110