A Study Reports the Following Data on 7-Day Flexural Strength

Essay

A study reports the following data on 7-day flexural strength of nonbloated burned clay aggregate concrete samples (psi): $$\begin{array} { l l l l l l l l l } 386 & 456 & 476 & 480 & 490 & 497 & 526 & 546 & 700 \\440 & 393 & 407 & 407 & 434 & 427 & 440 & 407 & 450 \\460 & 327 & 317 & 300 & 340 & 340 & 343 & 374 & 377\end{array}$$ Test at level .10 to decide whether flexural strength is a normally distributed variable.