The Google Play app store for smartphones offers hundreds of games to download for free or for a small fee. The ones for which a fee is charged are called paid games. For a random sample of five paid games taken in July 2014 on the Google platform, the following fees were charged: $1.09, $4.99, $1.99, $1.99, $2.99.
a. Find a point estimate of the mean fee for paid games available on Google’s platform.
b. The margin of error at the 95% confidence level for this point estimate is $1.85. Explain what this means.