Math Lesson 8
Population Samples

Practice Exercise 8-5

  Questions | Answer Key

Questions  (click HERE for a printer-friendly version)

Directions: Complete the problems below. Consult the Answer Key below for answers once you finish. Review the Instruction material which relates to any questions you do not get correct.

Answer the following questions.

1. A candy manufacturer states that the most of the candies in its bag are red. You randomly choose 10 candies from the bag. The color distribution of the sample is as follows:
           6 green
           3 red
           1 blue.
   Based on the sample, is the manufacturer's claim valid or not? _____
    
2. Use the random numbers below to state a valid claim: _____
   12, 15, 96, 14, 45 ,487, 45 ,78, 45, 78, 12, 98, 85 ,258
    
3. Jim claims that he picked 15 glass balls from a bag and 10 of them were red. If his claim is valid which color is in the majority in the bag? _____
    
4. A color pencil set includes 10 blue pencils, 5 black, 8 green and 1 yellow. Can the manufacturer validly claim that the set includes mostly blue pencils? _____
    
5. A candy manufacturer states that most  of the candies in its bag are red. You randomly choose 17 candies from the bag. The color distribution of the sample is as follows:
           6 green
          10 red
          1 blue.
   Based on the sample, is the manufacturer's claim valid or not? _____
    

Answer Key (click HERE for a printer-friendly version) (top) 

1. Not valid
    
2. A possible answer: most of the numbers are even.
    
3. red
    
4. yes
    
5. valid

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