Question
In: Statistics and Probability
Assume that daily TV viewing is normally distributed and has a mean of 8 hours per...
- Assume that daily TV viewing is normally distributed and has a mean of 8 hours per household with a standard deviation of 2 hours. Find the following probabilities:
- Probability that a randomly selected household views TV more than 10 hours a day, i.e. P( x > 10)
- Probability that a randomly selected household views TV more more than 11 hours a day, i.e. P(x > 11)
- Probability that a randomly selected household views TV less than 3 hours a day, i.e. P(x < 3)
- Probability that a randomly selected household views TV between 10 and 12 hours a day, i.e. P( 10 < x < 12)
Solutions
Expert Solution
Let "X" be household views TV more than 10 hours a day.
Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(1, TRUE)" to find the probability.
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Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(1.5, TRUE)" to find the probability.
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Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(-2.5, TRUE)" to find the probability.
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Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(2, TRUE)" & "=NORM.S.DIST(1, TRUE)" to find the probability.
orchestra answered 2 years agoRelated Solutions
Assume that daily TV viewing is normally distributed and has a mean of 8 hours per...
Assume that daily TV viewing is normally distributed and has a
mean of 8 hours per household with a standard deviation of 2 hours.
Find the following probabilities:
Probability that a randomly selected household views TV more
than 10 hours a day, i.e. P( x > 10)
Probability that a randomly selected household views TV more
more than 11 hours a day, i.e. P(x > 11)
Probability that a randomly selected household views TV less
than 3 hours a day,...
Suppose that the mean daily viewing time of television is 8.35 hours.
Suppose that the mean daily viewing time of television is 8.35 hours. Use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household (a) What is the probability that a household views television between 5 and 11 hours a day? (Round your answer to four decimal places.) Incorrect: Your answer is incorrect. (b) How many hours of television viewing must a household have in order to be in...
Average Daily TV Viewing Time Per U.S. Household Year Hours Min Total Min 1950 4 39...
Average Daily TV Viewing Time Per U.S.
Household
Year
Hours
Min
Total Min
1950
4
39
279
1955
5
5
305
1960
5
33
333
1965
6
4
364
1970
6
38
398
1975
7
7
427
1980
7
45
465
1985
8
22
502
1990
8
7
487
1995
8
38
518
2000
9
2
542
2005
9
30
570
2010
9
41
581
Click here for the Excel Data File
(a)
Fit a...
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
a formal hypothesis test as part...
Assume that a population is normally distributed with a population mean of μ = 8 and...
Assume that a population is normally distributed with a
population mean of μ = 8 and a population standard deviation of s =
2. [Notation: X ~ N(8,2) ] Use the Unit Normal Table to answer the
following questions. (I suggest you draw a picture of the normal
curve when answering these questions.)
8. Let X=4 Compute the z-score of X. For that
z-score:
a. What proportion of the area under the Unit Normal
Curve is in the tail? b....
Assume that a population is normally distributed with a population mean of μ = 8 and...
Assume that a population is normally distributed with a
population mean of μ = 8 and a population standard deviation of s =
2. [Notation: X ~ N(8,2) ] Use the Unit Normal Table to answer the
following questions. (I suggest you draw a picture of the normal
curve when answering these questions.)
8. Let X=7 Compute the z-score of X. For that
z-score:
a. What proportion of the area under the Unit Normal
Curve is in the tail? b....
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
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per week watching TV, and men, 24 hours per week. Assume that the
distribution of hours watched follows the normal distribution for
both groups, and that the standard deviation among the women is 5.0
hours and is 5.9 hours for the men.
What percent...
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
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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
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1 (b) Suppose the population mean and sample size is still 50.4
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8. Assume that adults have IQ scores that are normally distributed with a mean of 100...
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