The graph below represents the result of a survey in which a number of students reported how many letters were in their last names.
NAME LENGTH
NAME LENGTH
Number of Letters 3, 4 , 5 , 6 , 7 ,8 , 9 , 10
How many students were surveyed?
It is not possible to determine the number of students surveyed from the given information. There is no data or indication of how many students took part in the survey.
there were , 1 student with 3 letters in there name , 0 students with 4 , 1 students with 5 , 4 students with 6 letters , 0 students with 7 , 2 with 8 letters , 0 with 9 , 2 with 10 letters
In that case, the total number of students surveyed would be:
1 + 0 + 1 + 4 + 0 + 2 + 0 + 2 = 10
Therefore, 10 students were surveyed.
The students in a class collected data on the number of minutes some of them spend brushing their teeth every day. That data is shown in the dot plot below.
BRUSHING TEETH
BRUSHING TEETH
Time Brushing (minutes)
What was the median number of minutes students brushed their teeth?
minutes
1 spent 0.5 , 1 spent one minute , 0 spent 1.5 , 0 spent 2 , 0 spent 2.5 , 0 spent 3 , 3 spent 3.5 , 1 spent 4 , 1 spent 4.5
To find the median, we need to arrange the data in order from least to greatest:
0.5, 1, 3.5, 3.5, 3.5, 4, 4.5
The median is the middle value when the data is arranged in order. In this case, we have an even number of data points, so we take the average of the two middle values:
median = (3.5 + 3.5)/2 = 3.5
Therefore, the median number of minutes students brushed their teeth is 3.5.
The dot plot below represents how long it takes students in a 9th grade math class to get to school every morning.
COMMUTE TIME
COMMUTE TIME
Minutes
What was the most common commute time?
minutes
2 people did 5 , 8 people did 10 , 3 people did 15 , 3 people did 20 , 1 person did 25 , 2 people did 30 , 3 people did 35 , 1 person did 40 , 1 person did 45
The most common commute time is the mode, which is the value that appears most frequently in the data. In this case, the mode is 10 because it appears the most frequently with 8 students reporting 10 minutes as their commute time.
Therefore, the most common commute time for students in the 9th grade math class is 10 minutes.
The dot plot below represents the number of goals scored by the girls' soccer team in every game so far this season.
GOALS SCORED
GOALS SCORED
Goals
What was the range of goals scored?
goals
0 people did 0 , 3 people did 1 , 1 person did 2 , 0 people did 3 , 2 people did 4 , 0 people did 5
The range of goals scored is the difference between the highest and lowest values in the data. From the dot plot, we can see that the lowest value is 1 and the highest value is 4.
Therefore, the range of goals scored by the girls' soccer team in every game so far this season is:
4 - 1 = 3 goals.
The graph below represents the number of goals scored by the girls' soccer team in every game so far this season.
GOALS SCORED
GOALS SCORED
0
Goals
Frequency (Number of Games)
0
Goals
Frequency (Number of Games)
0
1
2
3
4
5
How many times did the team score 3 goals?
times