Recent results suggest that children with ADHD also tend to
watch more TV than children who are not diagnosed with the
disorder. To examine this relationship, a researcher obtains a
random sample of n = 36 children, 8 to 12 years
old, who have been diagnosed with ADHD. Each child is asked to keep
a journal recording how much time each day is spent watching TV.
The average daily time for the sample is M = 4.9
hours. It is known that the average time for the general population
of 8 to 12 year-old children is μ=
4.1 hours with σ =
1.8. (Show all work neatly, identify critical values and the test
used)
If the sample variance was 16, what would the new value be
for the test statistic? How would your conclusion change?