Summary statistics in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the mean of the numeric vector data.

R Programming

mean_value <- mean([1])

Drag options to blanks, or click blank then click option'

Asum

Bmean

Cdata

Dmedian

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the function name inside itself instead of the data vector.

Using sum or median instead of the data vector.

The mean() function calculates the average of the values in the vector data.

2fill in blank

medium

Complete the code to calculate the median of the numeric vector values.

R Programming

median_value <- median([1])

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Amedian

Bvalues

Cmean

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using the function name median inside itself instead of the data vector.

Using mean or length instead of the data vector.

The median() function finds the middle value of the vector values.

3fill in blank

hard

Fix the error in the code to calculate the standard deviation of scores.

R Programming

std_dev <- sd([1])

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Avar

Bsd

Cmean

Dscores

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the function name sd instead of the data vector.

Using mean or var instead of the data vector.

The sd() function calculates the standard deviation of the vector scores. You must pass the data vector, not the function name.

4fill in blank

hard

Fill both blanks to create a named list with mean and median of numbers.

R Programming

summary_stats <- list(mean = [1], median = [2])

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Amean(numbers)

Bmedian(numbers)

Cmean

Dnumbers

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the function names mean or median without calling them.

Using the vector numbers directly instead of calculating the statistics.

Use mean(numbers) and median(numbers) to calculate the values and assign them to the list.

5fill in blank

hard

Fill all three blanks to create a data frame with mean, median, and standard deviation of data_vec.

R Programming

stats_df <- data.frame(
  Mean = [1],
  Median = [2],
  SD = [3]
)

Drag options to blanks, or click blank then click option'

Amean(data_vec)

Bmedian(data_vec)

Csd(data_vec)

Ddata_vec

Attempts:

3 left

💡 Hint

Common Mistakes

Using the vector data_vec directly instead of calculating statistics.

Mixing up the order of mean, median, and standard deviation.

Calculate mean, median, and standard deviation of data_vec and assign them to the data frame columns.