Q$2.($Chi$-$square Test of Independence$).$ A company is experimenting with $5$ advertising formats on

digital platforms to know which ad is suitable to be published at platforms. In particular, there are $5$

platforms: $1.$ search, $2.$ display, $3.$ Video, $4.$ Facebook, $5.$ Email

While display ads can show up on sites across the Internet, search ads only appear in search engine

results. The digital marketing manager takes a sample of $1000$ clicked ads and checks the distribution of

ad per platform. Table below shows how number of clicks are distributed on platforms