On June 1st, 2020, the distribution of new Covid-19 cases by county had a mean of 7.29 and a standard deviation of 110.87. A dedicated but naive CDC analyst decides to model this data using a normal distribution. In other words, letting X be the number of new Covid-19 cases in a county, our analyst models the county-level new case counts as X - Normal(7.29, 110.87). For the following questions, pretend you are the CDC analyst, modeling new case counts as Normal(7.29, 110.87).
Question: You decide to look at the maximum number of cases in your data. The maximum number of cases on that day was 974 new cases, in LA county Calculate the Z-score for LA county's new Covid-19 cases.
A. -8.719
B. 8.719
C. 8.785
D. -8.785