There were 47 people surveyed on how many hours of TV they w

There were 47 people surveyed on how many hours of TV they watch. The sample showed a mean of 62.6 minutes with a standard deviation of 12.6. It is claimed that watching too much TV could lead to premature death. Let\'s say that the top 1% of TV watchers watch \"too much\" TV. Given this information, what is the minimum number of minutes that could shorten someone\'s life?

Solution

n=47

Mean= 62.6

SD = 12.6

alpha = 0.01

99% Confidence Interval

Standard Error = (z * SD)/sqrt(n)

= ( 2.576 * 12.6) / sqrt(47)

= 4.73

99% Confidence Interval:

=( 62.6 - 4.73 , 62.6+ 4.73)

=( 57.87 , 67.33 )

Therefore , minimum number of minutes that could shorten someone\'s life = 57.87 minutes Answer