Question
In: Statistics and Probability
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18...
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18 and over) per week in the United States is 36.07 hours. Suppose the standard deviation is 8.8 hours and a random sample of 48 adults is taken.
a. What is the probability that the sample average is more than 35 hours?
b. What is the probability that the sample average is less than 36.6 hours?
c. What is the probability that the sample average is less than 28 hours? If the sample average actually is less than 40 hours, what would it mean in terms of the Nielsen Media Research figures?
d. Suppose the population standard deviation is unknown. If 75% of all sample means are greater than 34 hours and the population mean is still 36.07 hours, what is the value of the population standard deviation? (Round the values of z to 2 decimal places. Round your answers to 4 decimal places.)
Solutions
orchestra answered 1 year agoRelated Solutions
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18...
According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 8.6 hours and a
random sample of 50 adults is taken. Appendix A Statistical Tables
a. What is the probability that the sample average is more than 38
hours? b. What is the probability that the sample average is less
than 38.5 hours? c. What is the probability...
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18...
According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 8.7 hours and a
random sample of 51 adults is taken. Appendix A Statistical Tables
a. What is the probability that the sample average is more than 36
hours? b. What is the probability that the sample average is less
than 36.6 hours? c. What is the probability...
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18...
According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 9.7 hours and a
random sample of 45 adults is taken.
a. What is the probability that the sample
average is more than 38 hours?
b. Suppose the population standard
deviation is unknown. If 71% of all sample means are greater than
35 hours and the population mean is...
According to Nielsen Media Research, the average number of hours of TV viewing by adults (18...
According to Nielsen Media Research, the average number of hours
of TV viewing by adults (18 and over) per week in the United States
is 36.07 hours. Suppose the standard deviation is 9.7 hours and a
random sample of 52 adults is taken.
a. What is the probability that the sample average is more than
35 hours?
b. What is the probability that the sample average is less than
38.8 hours?
c. What is the probability that the sample average...
According to Nielsen Media Research, the average number of hours of TV viewing per household 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.
1 (a) Suppose the population standard deviation is 11.8 hours and a
random sample of 42 U.S. household is taken, what is the
probability that the sample mean TV viewing time is between 47.5
and 52 hours?
1 (b) Suppose the population mean and sample size is still 50.4
hours and 42, respectively, but the population...
Nielsen Media Research collects information on daily TV viewing time, in hours, and publishes it findings...
Nielsen Media Research collects information on daily TV viewing
time, in hours, and publishes it findings in Time Spent
Viewing. A random sample of daily viewing times for men,
women, teens and children is obtained. The data are contained in
the table below.
a) Provide an appropriate graphical summary for the data.
b) Do the data provide sufficient evidence to conclude that a
difference exists among the means of the four view groups? Provide
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According to the South Dakota Department of Health, the number of hours of TV viewing per...
According to the South Dakota Department of Health, the number
of hours of TV viewing per week is higher among adult women than
adult men. A recent study showed women spent an average of 33 hours
per week watching TV, and men, 24 hours per week. Assume that the
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both groups, and that the standard deviation among the women is 5.0
hours and is 5.9 hours for the men.
What percent...
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S....
TV sets: According to the Nielsen Company, the mean number of TV
sets in a U.S. household in 2013 was 2.24. Assume the standard
deviation is 1.2. A sample of 80 households is drawn. Use the
Cumulative Normal Distribution Table if needed. Part 1 of 5 What is
the probability that the sample mean number of TV sets is greater
than 2? Round your answer to four decimal places. The probability
that the sample mean number of TV sets is...
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S....
TV sets: According to the Nielsen Company, the
mean number of TV sets in a U.S. household in a recent year was
2.24. Assume the standard deviation is 1.2. A sample of 85
households is drawn.
What is the probability that the sample mean number of TV sets
is between 2.5 and 3?
Find the 30th percentile of the sample mean.
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S....
TV sets: According to the Nielsen Company, the mean number of TV
sets in a U.S. household in 2013 was 2.24. Assume the standard
deviation is 1.4. A sample of 80 households is drawn. Use the
Cumulative Normal Distribution Table if needed. Part 1 of 5 What is
the probability that the sample mean number of TV sets is greater
than 2? Round your answer to four decimal places. The probability
that the sample mean number of TV sets is...
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