According to a Survey Conducted 5 Years Ago, the Proportion

Multiple Choice

According to a survey conducted 5 years ago, the proportion of left-handed students at a university was 0.12. Has the proportion increased over the years? A random sample of 50 students was chosen, 9 of whom were left-handed. Use the output from the Shiny app "Randomization Test for One Proportion" to complete an appropriate hypothesis test. ​ ​ Interpret the obtained results, using a significance level of 0.1. ​

A) There is convincing evidence that the proportion of left-handed students has decreased.
B) There is convincing evidence that the proportion of left-handed students has increased.
C) There is no convincing evidence that the proportion of left-handed students has increased.
D) The proportion of left-handed students has certainly remained the same.
E) The sample is too small to make a conclusion.