Question: Question is below. [4] 9. The following data gives the 7 day exural strength of concrete samples (psi). Test at level 0.10 to decide whether

Question is below.

[4] 9. The following data gives the 7 day exural strength of concrete samples (psi). Test at level 0.10 to decide whether exural strength is a normally distributed variable. [Use 6 equiprobable (based on the null hypothesis) class intervals] 257 327 317 300 340 340 343 374 377 386 383 393 407 407 434 427 440 407 450 440 456 460 456 476 480 490 497 526 546 700

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