In 2012, the Nielsen company reported that Americans watch 34 hours on average of TV per week. Imagine the standard deviation is 9.5 hours. If Gail wants her family to watch very little TV and hopes they will fall at the 15th percentile for TV viewing, how many hours is the limit to their viewing hours each week?
A. 33.71
B. 26.28
C. 24.22
D. 31.83
Sometimes the null hypothesis is considered to be
Select one:
A. the exciting hypothesis.
B. untestable because assumptions are not met.
C. testable only with parametric statistics.
D. the boring hypothesis.
Solution1:
z score for 15 th percentile=-1.036
z=x-mean/sd
-1.036=x-34/9.5
x=-1.036*9.5+34
x=24.2
ANSWER
MARK OPTION C
Solution2:
In null hypothesis we give
population parameters
Ha:mu=26,Ho:p=0.6,Ho:sigma=2.5
ANSWER
C. testable only with parametric statistics.
In 2012, the Nielsen company reported that Americans watch 34 hours on average of TV per...
According to Nielsen Media Research, the average number of hours of TV viewing per household per week in the United States is 50.4 hours. Suppose the standard deviation is 11.8 hours and a random sample of 42 U.S. households is taken. A. What is the probability that the sample average is more than 52 hours? B. What is the probability that the sample average is less than 47.5 hours? C. What is the probability that the sample average is less than 40 hours?...