An electronics engineer is interested in the effect on tube conductivity offive different types of coating for cathode ray tubes in atelecommunications system display device. The following conductivitydata are obtained.

If a = 0.05 , can you isolate any differences in meanconductivity due to the coating type? Since F, = Round your answers to 4 significant digits. in the rejection region, theresufficient evidence toconclude that the mean conductivity varies according to coating type.The plot below shows a normal curve with standard deviation =VMSEinalong with the treatment means. According to the plot, which means aresignificantly different?