What is the probability that the average of the 50 samples exceeds 7 minutes? (Hint: std. dev. of 0 a sample mean x, = (where o = 8). What the problem is asking for is P(Xsample > 7), √n

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Snapchat has over 200 million daily users sending over 3 billion snaps daily. The time X between snaps
has a mean (μ) of 8 minutes. 50 samples for time between snaps were collected for a study.
a.
What is the probability that the average of the 50 samples exceeds 7 minutes? (Hint: std. dev. of
a sample mean x, = (where σ = 8). What the problem is asking for is P(Xsample > 7),
σ
√n
normally distributed).
Transcribed Image Text:Snapchat has over 200 million daily users sending over 3 billion snaps daily. The time X between snaps has a mean (μ) of 8 minutes. 50 samples for time between snaps were collected for a study. a. What is the probability that the average of the 50 samples exceeds 7 minutes? (Hint: std. dev. of a sample mean x, = (where σ = 8). What the problem is asking for is P(Xsample > 7), σ √n normally distributed).
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