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Is there statistically significant evidence against the manufacturer's claim ? Why or why not?

rainbow

New member
Oct 25, 2018
13
form a conclusion about statistical significance. Do not make any formal calculations. Either use the results provided or make subjective judgments about the results.

a manufacturer of laptop computers claims that only 1% of their computers are defective. In a sample of 600 computers, it was found that 3% were defective. If the proportion of defectives were really only 1%, there would be less than 1 chance in 1000 of getting such a large proportion of defective laptops in the sample. Is there statistically significant evidence against the manufacturer's claim ? Why or why not?
 

Country Boy

Well-known member
MHB Math Helper
Jan 30, 2018
368
"If the proportion of defectives were really only 1%, there would be less than 1 chance in 1000 of getting such a large proportion of defective laptops in the sample. "

So what do you think? Is getting a result that is so unlikely to happen by chance "statistically significant"?