Chapter 3, Section 1, Exercise 021 How Many Apps for Your Smartphone? A random sample of n = average number of apps downloaded was 19.7. 461 smartphone users in the US in January 2015 found that 355 of them have downloaded an app.' Of the n = 355 smartphone users who had downloaded an app, the 'Olmstead K and Atkinson M, "Apps Permissions in the Google Play Store," pewresearch.org, November 10, 2015. %3D X Incorrect. (a) Give notation for the parameter of interest. P2 pi P2 The parameter of interest is u (b) Give the notation for the quantity we use to make the estimate. tく > Pi P2 P P2 The best estimate is SHOW HINT X Incorrect. (c) Give the value of the best estimate. Enter the exact answer. Best estimate =

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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.