Question

Write a program in RStudio. How do GPA scores vary by major in the dataset? Create a stacked bar chart to show the percentage of students in each major who received a certain GPA range (e.g., 7.0-8.5, 8.6-10.0). (For three semesters, separately)

Answer 1

To create a stacked bar chart to show the percentage of students in each major who received a certain GPA range in RStudio, you can use the 'ggplot2' package. Group the data by major and GPA range, calculate the percentage of students in each group, and then create the chart using the 'geom_bar' function.

Step-by-step explanation:

To create a stacked bar chart to show the percentage of students in each major who received a certain GPA range, you can use the 'ggplot2' package in RStudio. First, import the necessary packages and read in the dataset. Then, group the data by major and GPA range and calculate the percentage of students in each group. Finally, create a stacked bar chart using the 'geom_bar' function with the fill aesthetic mapped to the major and the y aesthetic mapped to the percentage.

Here's an example code:

library(ggplot2)
data <- read.csv('data.csv')

# Group data by major and GPA range
grouped_data <- data %>%
group_by(major, GPA_range) %>%
summarize(percentage = n()/length(data))

# Create stacked bar chart
ggplot(grouped_data, aes(x = GPA_range, y = percentage, fill = major)) +
geom_bar(stat = 'identity') +
labs(title = 'GPA scores by major', x = 'GPA Range', y = 'Percentage', fill = 'Major')