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CH 13 Study Guide A
Use the given data to answer the questions.
1. The favorite colors of 20 students are given below.
A tally chart is used to record the findings. Complete the table.
2. The table shows the number of children in 25 families.
Draw a dot plot to display the data.
3. The table shows the ages of employees in a company.
Draw a histogram to display the data.
4. The dot plot shows the points obtained by students in a quiz. If a student needed at least 6 points to pass the quiz, how many students passed the quiz.
5. The histogram shows the number of paper airplanes folded by students in a class. Briefly describe the distribution of the data.
Use the data in the table to answer questions 6 to 8.
The table shows the masses of 50 eggs.
6. Find the value of x.
7. Draw a histogram to represent the data.
8. An egg with a mass of at least 60 grams is considered large. What percent of the eggs is considered large?
Use the data in the dot plot below to answer questions 9 to 13.
The dot plot shows the results of a survey in which each family was asked how many computers they have. Each dot represents 1 family.
9. Mark an x on the dot plot to locate the median of the data.
10. How many families were surveyed in all?
11. Briefly describe the distribution of the data.
12. Find the total number of computers owned by all the families.
13. What percent of the families did not have a computer? Round your answer to the nearest hundredth.
ANSWER KEY:
1. The favorite colors of 20 students are given below.
A tally chart is used to record the findings. Complete the table.
2. The table shows the number of children in 25 families.
Draw a dot plot to display the data.
3. The table shows the ages of employees in a company.
Draw a histogram to display the data.
4. The dot plot shows the points obtained by students in a quiz. If a student needed at least 6 points to pass the quiz, how many students passed the quiz.
6: 6, 7: 3, 8: 4, 9: 2, 10: 1
6+3+4+2+1 = 16 students passed the quiz.
5. The histogram shows the number of paper airplanes folded by students in a class. Briefly describe the distribution of the data.
Total: There are 28 students in the class.
Most students folded between 4 and 9 airplanes.
The shape of the distribution is almost symmetrical.(versus asymmetrical).
Range: 13 (airplanes)
Use the data in the table to answer questions 6 to 8.
The table shows the masses of 50 eggs.
6. Find the value of x. x = 11
7. Draw a histogram to represent the data.
8. An egg with a mass of at least 60 grams is considered large. What percent of the eggs is considered large?
13/50 = 26%
Use the data in the dot plot below to answer questions 9 to 13.
The dot plot shows the results of a survey in which each family was asked how many computers they have. Each dot represents 1 family.
9. Mark an x on the dot plot to locate the median of the data.
In this question x should be on 5 in the 3 computer column.
order: 1,3,4,5,5,5,7
10. How many families were surveyed in all?
# families surveyed: 1+3+4+5+5+5+7 = 30 families
11. Briefly describe the distribution of the data.
Total: 30 families
Most families had between 2 and 5 computers.
The shape of the distribution is somewhat symmetrical being shifted slightly to the right side.
Range: 6-0 = 6
12. Find the total number of computers owned by all the families.
1 x 3 = 3
2 x 5 = 5
3 x 7 = 21
4 x 5 = 20
5 x 5 = 25
6 x 4 = 24
Total: 98 computers
13. What percent of the families did not have a computer? Round your answer to the nearest hundredth.
1/99 = 1.01%
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