Listed Below Are the April Utility Bills (In Dollars) for One

Essay

Listed below are the April utility bills (in dollars) for one neighborhood. Assuming that the data is normallydistributed, test the claim that the standard deviation for the data is $15. Use α = 0.01. $\begin{array} { l l l l l l l l l l } 70 & 48 & 41 & 68 & 69 & 55 & 70 & 57 & 60 & 83 \end{array}$
$\begin{array} { l l l l } 32 & 60 & 72 & 58 \end{array}$