Concept explainers
The running time for videos submitted to YouTube in a given week is
- If a single video is randomly selected, what is the probability that the running time of the video exceeds 6 minutes (360 seconds)?
- Suppose that a sample of 40 videos is selected. What is the probability that the
mean running time of the sample exceeds 6 minutes?
(a)
To find:the probability that the running time of the video exceeds 6 minutes (
If a single video is randomly selected,
Answer to Problem 11CQ
The required answer is
Explanation of Solution
Given,
If a single video is randomly selected then the mean of
Calculation Required:
The required probability that
Using normal table,
Calculation Steps:
Given that a normal distribution has mean of
If a single video is randomly selected then the mean of
The standard deviation is,
To compute the probability that
1. Click CaIc, then select Probability distributions and then go to Normal.
2. Select the Cumulative option.
3. Enter
4. Enter
5. Click Ok. The final output is given below.
Cumulative distribution function.
Normal with mean
The required probability that
The required answer is
(b)
To find: the probability that the mean running time of the sample exceeds
Answer to Problem 11CQ
The required answer is
Explanation of Solution
Given,
If
Calculation Required:
Using normal table,
Calculation Steps :
If
The standard deviation is,
The final output is given below.
The final output is given below.
Cumulative distribution function
Normal with mean
The required probability that
The required answer is
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Chapter 7 Solutions
Elementary Statistics
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCalculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,