Step $9-$ Confidence Intervals for the Average Relative Skill of All Teams in the Assigned

Team's Years

The management also wants to you to calculate a $95\%$ confidence interval for the average relative skill of all teams in the years $1996-1998.$ Calculate this

confidence interval.

You are to write this code block yourself.

Use Step $8$ to help you write this code block. Here is some information that will help you write this code block. Reach out to your instructor if you need

help.

The dataframe for the years $1996-1998$ is called assigned$\_$years$\_$league$\_$df

The variable 'elo$\_$n$\text{'}$ represents the relative skill of teams.

Start by calculating the mean and the standard deviation of relative skill $($ELO$)$ in years $1996-1998.$

Calculate $n$ that represents the sample size.

Calculate the standard error which is equal to the standard deviation of Relative Skill $($ELO$)$ divided by the square root of the sample size n $.$

Assuming that the population standard deviation is known, use Python methods for the Normal distribution to calculate the confidence interval.

Your statistics should be rounded to two decimal places.

Write your code in the code block section below. After you are done, click this block of code and hit the Run button above. Reach out to your instructor if

you need more help with this step.

# Write your code in this code block section