MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:Studies have suggested that twins, in their early years, tend to have lower IQs and pick up language more slowly than nontwins. The
slower intellectual growth might be caused by benign parental neglect. Suppose it is desired to estimate the mean attention time given to twins
per week by their parents. A sample of 60 sets of 2 year old boys is taken, and after 1 week the attention time received was recorded. The data
(in hours) calculated the mean at 24. The standard deviation was found to be 15. Use this information to construct a 80% confidence interval for
the mean attention time given to all twin boys by their parents.
Use at least 3 decimal places for your critical value, and give your answers to at least 2 decimal places.
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