Sue thinks that there is a difference in quality of life between rural and urban

Question

Sue thinks that there is a difference in quality of life between rural and urban living. She collects information from obituaries in newspapers from urban and rural towns in Idaho to see if there is a difference in life expectancy. A sample of 16 people from rural towns give a life expectancy of xr¯=82.3 years with a standard deviation of sr=6 years. A sample of 10 people from larger towns give xu¯=83.4 years and su=6.77 years. Does this provide evidence that people living in rural Idaho communities have different life expectancy than those in more urban communities? Use a 10% level of significance.

(a)The degree of freedom is :

Explanation / Answer

degree of freedom =n1+n2-2= 16+10-2=14+10=24 ............( this is valid when population variance is same)

degree of freedom= smaller sample -1=10-1=9

..................

if you need more clearification ask in comment , give thumbs up if you like work

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.