- 2 A Random Sample Of 85 Supervisors Revealed That They Worked An Average Of 6 7 Years Before Being Promoted The Popula 1 (17.48 KiB) Viewed 23 times
2) A random sample of 85 supervisors revealed that they worked an average of 6.7 years before being promoted. The popula
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2) A random sample of 85 supervisors revealed that they worked an average of 6.7 years before being promoted. The popula
2) A random sample of 85 supervisors revealed that they worked an average of 6.7 years before being promoted. The population standard deviation was 1.9 years. Using the 0.95level of confidence, what is the confidence interval for the population mean? A) 7.15 and 8.23 B) 4.31 and 7.39 C) 6.30 and 7.10 D) 6.65 and 7.73
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