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

MATLAB: An Introduction with Applications
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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

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