This is a two-sided hypothesis test for a proportion.
=.1" alt="H_0=.1" /> vs. \ne .1" alt="H_a\ne .1" />.
n=60, and you can use the normal approximation to get a z-score.
The rejection region is .
Assuming the population of left-handed people is 10%. Is there a difference between percent of left students in our class and the population at the 5% significance level?
What information is given: In our class there is 60 students 3 of them are left handed.