Answer:
- The true percentage actually differ from 85%, 10%, and 5%
- chi-square statistic. = 5.0294
Explanation:
85% of fasteners = conforming
10% of fasteners = downgraded
5% of fasteners = scrap
In a sample size of 500 fasteners
410 = conforming , 55 = downgraded,
The true percentage actually differ from 85%, 10%, and 5% as shown below
Observed Expected
conforming 410 500*0.85 = 425
Downgraded 55 500*0.10 = 50
Scrap 35 500 * 0.05 = 25
Test statistic
determine the test statistic
= [ (410 - 425)2 / 425 + (55 -50)2 / 50 + (35 - 25)2 / 25 ]
chi-square statistic. = 5.0294