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

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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
4
Trial 1
108
140
154
115
130
111
108
Trial 2
99
118
154
96
107
102
110
o -0.7 < µ, - µ, < 23.5
O -2.9 < µ, - µ, <25.7
O 2.9 <u, - u, < 25.7
O 0.7 < µ, - µ, < 23.5
3.
Transcribed Image Text: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 4 Trial 1 108 140 154 115 130 111 108 Trial 2 99 118 154 96 107 102 110 o -0.7 < µ, - µ, < 23.5 O -2.9 < µ, - µ, <25.7 O 2.9 <u, - u, < 25.7 O 0.7 < µ, - µ, < 23.5 3.
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