A random sample of n=461 smartphone users in the US in January 2015 found that 355 of them have downloaded an app.1 Of the n=355 smartphone users who had downloaded an app, the average number of apps downloaded was 19.7. 1Olmstead K and Atkinson M, "Apps Permissions in the Google Play Store," pewresearch.org, November 10, 2015.               Incorrect.     (a) Give notation for the parameter of interest.       SHOW HINT LINK TO TEXT           Incorrect.     (b) Give the notation for the quantity we use to make the estimate.       SHOW HINT LINK TO TEXT           Incorrect.     (c) Give the value of the best estimate. Enter the exact answer.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.