Answered

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A student's iTunes music library has a very large number of songs. The mean length of
the songs is 243 seconds, and the standard deviation is 93 seconds. The distribution of
song lengths is right-skewed. Using his digital music player, this student will create a
playlist that consists of 25 randomly selected songs.
QUESTIONS
a. Is the mean value of 243 minutes an example of a parameter or a statistic? Explain.
b. What should the student expect the average song length to be for his playlist?
c. What is the standard error for the sample mean song length of 25 randomly selected songs?

Sagot :

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