The scatter plots shows the amount of time it took for 10 groups of different sizes to play a game of miniature golf.

how many groups completed the course in less than 90 minutes?

enter your answer in the box.

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample