1. How do we know if a population parameter from population 1 is…

Question Answered step-by-step 1. How do we know if a population parameter from population 1 is… 1. How do we know if a population parameter from population 1 is significantly higher, significantly lower, or not significantly different than population 2? Look at the following two-population confidence interval example calculated from data from a business. The data came from random samples and passed all of the assumptions. Use this printout to answer questions #2-6.95% confidence levelPopulation 1: population mean average salary for part-time employees in dollars per hour.Population 2: population mean average salary for full-time employees in dollars per hour.Sample Difference: – $2.36 (Sample mean average salary for part-time employees was $2.36 less than for full-time employees.)Margin of Error: $0.82Confidence Interval Lower Limit: – $3.18Confidence Interval Upper Limit: – $1.54Confidence Interval: ( -$3.18 , -$1.54 ) 2. How did the computer use the sample difference ( – $2.36 ) and the margin of error ( $0.82 ) to calculate the upper and lower limits of the confidence interval?3.A statistics student was asked if the population mean average salary for part-time employees was significantly higher, significantly lower or not significantly different than for full time employees. The statistics student said, “I am 95% confident that the population mean average salary for population 1 (part-time employees) is significantly LOWER than the population mean average salary for population 2 (full-time employees). This is absolutely correct! How did the statistics student know this?4.A statistics student says that the the population mean average salary for all part-time employees is exactly $2.36 less than the population mean average salary for full-time employees. This is totally wrong. Why do you think statistics students make this mistake?5.A statistics student says that the population mean average salary for part-time employees is exactly $1.54 per hour and the population mean average salary for full-time employees is $3.18 per hour. This is totally wrong. Why do you think statistics students make this mistake?6.A statistics student was asked much lower could the population mean average salary for all part-time employees be than the population mean average salary for all full-time employees? The statistics student said, “I do not know exactly how much lower since I only have sample data. I can say that I am 95% confident that the population mean average salary for part-time employees at this company is between $1.54 and $3.18 lower than for full-time employees”. Explain why this is the correct interpretation of the confidence interval. Math Statistics and Probability NC.CAWT 26400 Share QuestionEmailCopy link Comments (0)