An investment advisory company studied funds available on the
market: Large cap, mid-cap, and small-cap. The company randomly
selected some funds and measured their 1-year return rate
(2011-2012) and 3-year return rate (2011-2014), respectively. Data
is supplied in both Minitab and Excel format.

Some investors asked you whether they should invest in large-cap
funds or mid-cap funds for better return (3-year return). Can you
take a look at the data and tell the investors which type they
should choose? Use significance level of 0.05, present your
five-step procedure.