Some babies start walking well before they are a year old, while others haven't taken their first unassisted steps at 18 months or even later. The data below is from an experiment designed to see whether a program of special exercises for 12 minutes each day could speed up the process of learning to walk. Twelve week-old male infants were randomly assigned to either the special exercise groups or to the control group. The age (in months) when the infant first walked without support was recorded. Special Exercises Exercise Control Construct a 98% confidence interval estimate of the difference between waling times for the special exercises group and the exercise control group if all babies could have had each treatment. 9. 9.5 9.75 10 13 9.5 11 10 10 11.75 10.5 15

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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1. Some babies start walking well before they are a year old, while others haven't taken
their first unassisted steps at 18 months or even later. The data below is from an
experiment designed to see whether a program of special exercises for 12 minutes
each day could speed up the process of learning to walk. Twelve week-old male
infants were randomly assigned to either the special exercise groups or to the control
group. The age (in months) when the infant first walked without support was
recorded.
Special Exercises
Exercise Control
Construct a 98% confidence interval estimate of the difference between waling times
for the special exercises group and the exercise control group if all babies could have
had each treatment.
6.
9.5
9.75
10
13
9.5
11
10
10
11.75
10.5
15
Transcribed Image Text:1. Some babies start walking well before they are a year old, while others haven't taken their first unassisted steps at 18 months or even later. The data below is from an experiment designed to see whether a program of special exercises for 12 minutes each day could speed up the process of learning to walk. Twelve week-old male infants were randomly assigned to either the special exercise groups or to the control group. The age (in months) when the infant first walked without support was recorded. Special Exercises Exercise Control Construct a 98% confidence interval estimate of the difference between waling times for the special exercises group and the exercise control group if all babies could have had each treatment. 6. 9.5 9.75 10 13 9.5 11 10 10 11.75 10.5 15
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