CAS MA 416 Lecture 15: MA416 Lecture15

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11/6 chapter 19 two-factor designs with equal sample sizes. =cleanliness of laundry (scale 1-15, 1 =dirties, 15=cleaniest) (cid:3036)(cid:3037)(cid:3038) =cleanliness rating for the kth level of laundry washed with temperature j and detergent (cid:1861) (cid:1863)=(cid:883),(cid:884),(cid:885),(cid:886) (cid:1862)=(cid:883),(cid:884),(cid:885),(cid:1861)=(cid:883),(cid:884) (cid:1866)(cid:3036)(cid:3037)=# of observations in each (cid:1861),(cid:1862) cell =4. (cid:2868):(cid:2869)=(cid:2870) , where (cid:3036) = cleanliness rate for detergent (cid:1861) (cid:2869):(cid:2869) (cid:2870) (cid:2868): (cid:2869)= (cid:2870)= (cid:2871), where (cid:3037)=cleanliness rating for temperature j (cid:2869): not (cid:2868) (cid:2868): no interaction between detergent and temperature on cleanliness (cid:2869): there is an interaction between detergent and temperature on cleanliness (cid:2869) =(cid:890). (cid:883)(cid:889) i=1 (cid:2869)(cid:2869) =(cid:887). (cid:882) (cid:2869)(cid:2870) =(cid:891). (cid:882) (cid:2869)(cid:2871) =(cid:883)(cid:882). (cid:887) (cid:2870) =(cid:883)(cid:882) i=2 (cid:2870)(cid:2869) =(cid:887). (cid:882) (cid:2870)(cid:2870) =(cid:883)(cid:885). (cid:882) (cid:2870)(cid:2871) =(cid:883)(cid:884). (cid:882) (cid:2869) =(cid:887). (cid:882) (cid:2870) =(cid:883)(cid:883). (cid:882) (cid:2871) =(cid:883)(cid:883). (cid:884)(cid:887) =(cid:891). (cid:882)(cid:890) (cid:3036)(cid:3037) =(cid:1865)(cid:1857)(cid:1866) (cid:1867)(cid:1858) (cid:1861)(cid:1866) (cid:1855)(cid:1857)(cid:1864)(cid:1864) (cid:1861),(cid:1862) => an estimator of (cid:3036)(cid:3037) (cid:3036) =(cid:1865)(cid:1857)(cid:1866) (cid:1867)(cid:1858) (cid:1858)(cid:1867) (cid:1856)(cid:1857)(cid:1857)(cid:1859)(cid:1857)(cid:1866) (cid:1861) => an estimator of (cid:3036: (true mean.

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