Chapter: Normal Distribution The running time for videos submitted to Youtube in a given week is normally distributed with μ=390 seconds and standard deviation σ = 148 seconds. A) If a single video is randomly selected, what is the probability that the running time of the video exceeds 6 minutes (360 seconds)? B) Suppose that sample of 40 videos is selected. What is the probability that the mean running time of the sample exceeds 6 minutes? Must show which tables were used, if it's area of the left, and a bell curve or the like. (I have the answer, it's just that I would like better help understanding how to do the probelm and so it matches the answer I have for my book, as the answers I got before didn't match so I just want to be I know how to do the steps correctly. So it's supposed to be .5803 and normalcdf (360, 1E99, 390, 148)=.5803162711 for part A, and for part B it's .9001 and normalcdf (360, 1E99, 390, 148/√(40))=.9000793931. Thank you)
Chapter: Normal Distribution
The running time for videos submitted to Youtube in a given week is
A) If a single video is randomly selected, what is the
B) Suppose that sample of 40 videos is selected. What is the probability that the
Must show which tables were used, if it's area of the left, and a bell curve or the like.
(I have the answer, it's just that I would like better help understanding how to do the probelm and so it matches the answer I have for my book, as the answers I got before didn't match so I just want to be I know how to do the steps correctly. So it's supposed to be .5803 and normalcdf (360, 1E99, 390, 148)=.5803162711 for part A, and for part B it's .9001 and normalcdf (360, 1E99, 390, 148/√(40))=.9000793931. Thank you)
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