Dataset: cabbage.csv

This dataset has 60 observations and 4 variables:

• Cult - Factor giving the cultivar of the cabbage, two levels: c39 and c52.
• Date - Factor specifying one of three planting dates: d16, d20 or d21.
• HeadWt - Weight of the cabbage head, presumably in kg.
• VitC - Ascorbic acid content, in undefined units.

Perform a hypothesis test to test if the vitamin C content in the C52 cultivar is greater than the C39 cultivar. Consider all planting dates. Use the 7(9) step procedure and set a significance level to 0.05. (Hint: in the data step you will need to pull out the Vitamin C values for the C39 cultivar and the C52 cultivar separately. If all else fails manually type these numbers into R.)