A study is made of the effect of curing temperature on the compressive strength of a certain type of concrete. Five concrete specimens are cured at each of four temperatures, and the compressive strength of each specimen is measured (in MPa). The results are as follows:

a. Construct an ANOVA table. You may give a range for the P-value.
b. Can you conclude that the mean strength differs with temperature?

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Temperature (°C) Strengths 10 20 30 312 29.6 308 30.0 31.4 30.0 27.7 3 31.3 30.6 35.9 36.8 35.0 34.6 36.5 38.3 37.0 37.5 36.1 38.4