Question: Manipulate data in R, based on data below. Dataset below is in a file QuizScore.txt. When you read the file into R session, you assign

  1. Manipulate data in R, based on data below. Dataset below is in a file QuizScore.txt.

When you read the file into R session, you assign the name qz to the dataset. score, approach, and group are column headings for the three data columns in the file. Write statements and commands to do the following calculations:

  1. Calculate the mean of the score.
  2. Calculate the means of scores in the different groups.
  3. Calculate the means of scores using different approaches.
  4. Create a table of score means using approach row label and group as column label.

  1. How to refer to the element in the 5throw and 2ndcolumn in the data set?

  1. How to refer to the 3rdrow in the dataset?

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