In rqti: Create Tests According to QTI 2.1 Standard

question

Choose the correct order in the multiplication table

other table:

|w|w|w| |-|-|-| |a|b|c| |1|2|3|

html table:

col1	col2
1	2

|formulas|Mean|Standard Deviation|Normal Distribution|Hypothesis Testing (t-test)| |------|-----|------------------|-------------------|---------------------------| |$$\bar{x} = \frac{1}{n} \sum_{i=1}^{n} x_i$$|1|0|0|0| |$$s = \sqrt{\frac{1}{n-1} \sum_{i=1}^{n} (x_i - \bar{x})^2}$$|0|1|0|0| |$$f(x) = \frac{1}{\sigma \sqrt{2\pi}} e^{-\frac{(x-\mu)^2}{2\sigma^2}}$$|0|0|1|0| |$$t = \frac{\bar{x}_1 - \bar{x}_2}{\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2}}}$$|0|0|0|1|

library(ggplot2)
# Display the histogram plot
v <- c(5, 9, 13, 2, 50, 20, 59, 36, 23, 2, 8, 27, 72, 14)

histogram_2 <- ggplot(data = NULL, aes(x = v)) +
  geom_histogram(binwidth = 5, fill = "red", color = "black") +
  xlab("Weight")
ggsave("pic_1.png", plot = histogram_2, width = 5, height = 3, dpi = 300)

{width=300px height=200px}

Histogram of Normal Distribution Values

feedback

The correct answer is Histogram of Distribution of a numeric variable’s values.

{width=300px height=200px}

rqti documentation built on April 3, 2025, 7:43 p.m.