What are the mean and standard deviation for the sample mean number of app engagement by a tablet user?                                                                                                                                                                                                                                                       Find the 90th percentile for the sample mean time for app engagement for a tablet user.                                                                                           Find the probability that the sample mean is between eight minutes and 8.5 minutes.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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The mean number of minutes for app engagement by a tablet user is 8.2 minutes. Suppose the standard deviation is one minute. Take a sample of 60.

  1. What are the mean and standard deviation for the sample mean number of app engagement by a tablet user?                                                                                         
                                                                                                                                                                
  2. Find the 90th percentile for the sample mean time for app engagement for a tablet user.                                                                                          

  3. Find the probability that the sample mean is between eight minutes and 8.5 minutes.

                                                                                                        

 
 
 
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