Normally, we would want to check that the "response variablevaries normallywithin each of the populations." Which of the following is most true?

• The three histograms look mostly normal. A couple of them might have outliers
• The three histograms look mostly normal and all three have clear outliers
• All three of the histograms look like the perfectly conform to a normal curve
• None of the three histograms looks anything like a normal curve

Frequency 50- 40- 30- 20- 10 60000 80000 100000 120000 140000 160000 180000 SalaryFrequency 80 60- 40- 20 50000 100000 150000 SalaryFrequency 154 10 5. 60000 80000 100000 120000 140000 Salary