Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 HMH Go Math - Answer Keys


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A manufacturer gets a shipment of 600 batteries of which 50 are defective. The store manager wants to be able to test random samples in future shipments. She tests a random sample of 20 batteries in this shipment to see whether a sample of that size produces a reasonable inference about the entire shipment.

  • Question 1 (request help)

    The manager selects a random sample using the formula randInt( , ) to generate _____ random numbers.
  • Type below:
  • Question 2 (request help)

    She lets numbers from 1 to _____ represent defective batteries, and _____ to _____ represent working batteries. She generates this list: 120, 413, 472, 564, 38, 266, 344, 476, 486, 177, 26, 331, 358, 131, 352, 227, 31, 253, 31, 277.
  • Type below:
  • Question 3 (request help)

    Does the sample produce a reasonable inference?
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  Essential Question Check-In  

  • Question 4 (request help)

    What can happen if a sample is too small or is not random?
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