Interactive practice questions
At a certain university, $15%$15% of students study psychology.
$2000$2000 random students have been asked what subject they are studying. Of those asked, $12%$12% were psychology students.
What is the population?
all lecturers at the university
the $2000$2000 students asked to rate their lecturers' teaching
all students at the university who study psychology
all students at the university
What is the value of the population proportion?
What is the value of the sample proportion?
A survey was carried out to investigate the number of teachers in Australian schools who like using the chalkboard to teach. This survey found that in a sample of $1222$1222 teachers, $321$321 liked using the chalkboard, while the rest did not.
Lachlan wanted to know the proportion of commuters that regularly listen to music on his train. In his carriage, he found that in a sample of $35$35 commuters, $7$7 were listening to music.
A survey involving $218$218 midwives found that $150$150 of them were aged between $46$46 and $60$60 years.