Which of these would not produce a representative sample that determines the favorite sport of the students at the local high school?
ask five students from each classroom chosen by picking numbers
ask every tenth student from a list of names in the student directory
ask every tenth student who arrives at school on Wednesday
ask ten students wearing football jerseys each day for a week
The option that would not produce a representative sample is "ask ten students wearing football jerseys each day for a week." This method would bias the sample towards students who wear football jerseys, potentially inflating the proportion of students who favor football as their favorite sport at the local high school.
Some friends are making three-dimensional figures using origami paper. The time spent making the figures and the number of pieces of origami paper remaining are shown in the scatter plot.
The equation for the line of good fit shown on the scatter plot is y = -60x + 500. What
does the slope of the line represent in this situation?
a decrease of 60 pieces of paper every hour
a decrease of 60 pieces of paper every 500 hours
the number of hours it will take to use 500 pieces of paper
the number of hours it will take to use 60 pieces of paper
The slope of the line, which is -60 in this case, represents a decrease of 60 pieces of paper every hour. Therefore, the correct answer is "a decrease of 60 pieces of paper every hour."
Kolams are a form of art created with rice flour. They represent happiness and success.
The number of minutes Nya spends making kolams each day for 7 days are listed below.
18, 21, 19, 22, 19, 56, 20
Use the drop-down menus to explain whether the mean or the median is the best measure of center for describing the number of minutes Nyra spends making kolams on a typical day.
Click the arrows to choose an answer from each menu.
There is an outlier in Nya's data, which
Choose...does not affect or affect
the mean and
Choose...affects or does not affect
the median. Most of the values in the data set are less than the
Choose...mean or median
so the
Choose...mean or median
is the best measure of center for the number of minutes Nyra typically spends making kolams.