In a Diet Test, Each of Four Diet Programs Is $\text { Diet Program }$

Essay

In a diet test, each of four diet programs is applies to a sample of people. At the end of three weeks, the amount of pounds people lost is shown below. $\text { Diet Program }$
$\begin{array} { | c | c | c | c | } \hline 1 & 2 & 3 & 4 \\\hline 12 & 19 & 16 & 28 \\\hline 6 & 10 & 20 & 17 \\\hline 18 & 13 & 26 & 22 \\\hline 23 & 20 & 19 & 16 \\\hline & 25 & & 20 \\\hline\end{array}$ Test to determine whether there is enough evidence at the 5% significance level to infer that at least two population locations differ.