Rainy day fun
the summer camp for kids staff is planning an indoor activity for the
campers to do on rainy days. they are considering a lego activity and
a finger painting activity. they send out a survey to all the kids who
will be coming to the camp to find out their preferences.
the staff organized the results of the survey in this table:
legos painting total
boys 37 | 8 | 45
girls 26 14 40
total 63 22 85
a table like this that displays data in rows and columns is
called a two-way frequency table.
what does this two-way frequency table tell us?
1. how many boys preferred legos?
2. how many girls preferred legos?
3. how many campers preferred painting?
4. how many girls responded to the survey?
5. how many campers responded to the survey?
the data in the middle of the table
are called the joint frequencies(37,26,8,& 14)
the data on the edges of the table are called the marginal frequencies
(
140 95 2263)