For this lesson we are going to use both the statistics and math libraries to simulate the results of the sciPy library. If you couldn't use the sciPy library, how would you calculate z-scores? Create two functions (inside the lesson. py module) def calculate_sample_zscores (n): return None def calculate_pop_zscores (n): return None 1. Each function calculates zscores for the input n -- which is a list of numbers. One is for a population of values, the other for a sample of values.
2. Both functions return a list of corresponding zscores.
3. Do NOT use the sciPy zscore function (comment out any code that imports it or uses it).
4. You may need to consult the documentation for both math and statistics modules (urls given above). There's no need to do the full calculation yourself, use the libraries to help you get the mean and standard deviation.
5. You can assume that the parameter is not None. However, it could be empty.

Assume that there is a 4% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

What season was better from fortnite?

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;