Using CRAN R Project - The R Project for Statistical Computing

*** NOT A QUESTION - TO ANSWERS THIS I AM UNABLE TO POST THE DATA BUT IF YOU GOOGLE HSB2 DATASET YOU SHOULD BE ABLE TO FIND IT ON OPENINTRO.ORG***

*** PLEASE POST WORKSPACE AND R CONSOLE***

1.Using the database titled "HSB2" complete the following task.

The hsb2 dataset is taken from a national survey of high school seniors. Two hundred observations were randomly sampled from the High School and Beyond survey. Descriptive statistics and exploratory data analyses are shown below.

Answer the following questions below. You are only allowed to use R and need to turn in your R script and console (13 points)

a.What are the dimensions of the dataset?

b.Run a 95% confidence interval on the science scores.

c.What does the confidence interval tell you about the population mean?

d.What is the describe on the original dataframe hsb2. What do these data tell you? Be specific to the numerical results you receive.

e.construct table in R using the summary data from above and call the table.

f.What row and column do you find the standard error for science scores?

g.How would you write the code to find this in R?

hsb2 (12 points)

1.Calculate the mean for the data parameter math.

2. Calculate z scores for the data parameter math.

3. Construct a histogram of the z score data for math, what is an appropriate figure legend.

5. Construct a histogram of the data for math, what is an appropriate figure legend.

6. Compare the two histograms.

7. With your knowledge of z scores and standard deviation what can you say about the data for math? Be specific to unusual values.