Water used for irrigation in coastal areas often has high salinity levels, which may have detrimental effects on some crops. A controlled experiment is conducted to study the effect of salinity levels, as measured by electrical conductivity - EC (nohms/cm), on the yield of tomatoes (kg/plot) using four experimental plots, with each plot irrigated with water with a different level of EC. Data from the experiment are provided in the fourth tab of the data file.

a. State the null and alternative hypothesis.

b. Assess the requirements of the analysis.

c. Interpret the conclusion of the hypothesis test using the appropriate statistics from the ANOVA table.

d. Run a post-hoc Tukey test and use the results to explain which data sets are different from each other (if any).

Data:

Electrical-conductivity = 1.6 nohms/cmElectrical-conductivity = 3.8 nohms/cmElectrical-conductivity = 6.0 nohms/cmElectrical-conductivity = 10.2 nohms/cm 59.555.251.744.6 53.359.148.848.5 56.852.853.941 63.154.54947.3 58.746.1