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Hypothesis testing for difference between two means-unequal variance.

A study was conducted on the annual incomes of corporate trainers in the state of New York in metropolitan areas having a population less than 100,000 and in metropolitan areas having a population over 500,000.  Some sample statistics are:

 

Sample Statistic

Population less than 100K

Population more than 500K

Sample Size

45

60

Sample Mean

$31,290

$31,330

Sample SD

$1,060

$1,900

 

Test hypothesis that the annual incomes of corporate trainers in areas of more than 500,000 are significantly more than those in areas of less than 100,000.  Utilize the 5 percent level of risk.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918189

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