On a normal April day, Chipotle sells an average of 60 burritos with a standard deviation of 15. However, during the past 14 days in quarantine, Chipotle has averaged only 50 burritos per day. I want to test if this decrease is statistically significant (aka can I reject the null?) at the 5% level. What is the test statistic I should use? Round to two decimal points.

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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.