Lesson 1
1. Lesson 1
1.9. Explore 5
Module 1: Probability
In Try This 3 the probability that a media player was defective was determined by the ratio 
which is equal to 
or 0.010 36.
The probability determined in the random sample can be used to estimate the number of defective media players in the larger group of 12 000.
Compare the following two strategies to arrive at your solution.
Strategy 1 |
Multiply the total number of media players by the probability.
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| Strategy 2 |
The proportion of defective media players in the random sample should be the same as the proportion of defective media players in the entire production run.
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Based on the results from the random sample, in a production run of 12 000 media players, it can be expected that approximately 124 will be defective.
Try This 4
Turn to page 149 of the textbook and read “Example 1.” You may notice that it is similar to the Try This 3 media player problem.
Use Try This 3 as a guide to solve the Example 1 problem before reading the solution provided in the textbook.
When you have completed the questions in the example, check your answers with the solution provided on the bottom of page 149 and the top of page 150 before continuing.