Substitution. 3x + 2y = 12 y = 2x – 1
1 answer:
You might be interested in
Answer: (0.665 , 0.777)
Step-by-step explanation:
Given : Sample size of consumers: n=420 ;
Number of consumers say their ColorSmart-5000 television sets did not need a repair=303
The the sample proportion for consumers say their ColorSmart-5000 television sets did not need a repair :
Significance level :
Critical value =
The confidence interval for population proportion is given by :_
i.e.
Hence, a 99 percent confidence interval for the proportion of all ColorSmart-5000 television sets that have lasted at least five years without needing a single repair = (0.665 , 0.777)