Part $1$: The Central Limit Theorem

$1\mathrm{.}1[1$ pt$]$ Consider the population of interest to be all taxi rides taken in New York City between $2010$ and $2013.$ The taxi rides in the dataset are a sample

of the taxi rides in the population. How many observations are in the sample? Store your answers in the variable sample$\_$size.

In $[]$: sample$\_$size $=$ None

lab

# YOUR CODE HERE

raise NotImplementedError$()$

In $[]$: #hidden tests for problem $1\mathrm{.}1$ are within this cell

$1\mathrm{.}2[1$ pt$]$ What is the sample mean of tip percentage? What is the sample variance of tip percentage? Given the sample size and the sample variance, what

is the standard error of the sample mean of tip percentages?

Remember to set the ddof parameter to take in account the fact that the sample variance is calculated with the sample mean instead of the population

mean.

In $[]$: tip$\_$percentages $=$ np$.$array$($taxi$[\text{'}$tip$\_$percentage'$])$

sample$\_$mean $=$ None

sample$\_$var $=$ None

standard$\_$error $=$ None

# YOUR CODE HERE

raise NotImplementedError$()$

In $[]$: #hidden tests for problem $1\mathrm{.}2$ are within this cell