Question


A manufacturer produces both a deluxe and a standard model of an automatic sander designed for home use. Selling prices obtained from a sample of retail ourlets folow Excel Files data10-27xls Model Price Model Price ( Retail Outles Deluxe Standard Retail Outlet Deluse Standard 40 39 19 45 38 28 35 30 30. 34 29 ound your answers to 2 decimal places a. The manufacturers sugpested Do sot resect the mull bypothesis (H30) b. what is the 95% confidence interval for the diference between the mean st that the mean difference between the prices of the two mdels is $10 retail prices for the two models show a s10 price differential Use a o5 level of significance and te prees of the two modele (to 2 dee us) 6.47 to 12.76 Hide Feedback Partially Correct Check Hy Work
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Answer #1

Deluxe 39 39 45 standard 27 28 35 30 30 difference(d) x1-x2 12 S. No 144.000000 121.000000 100.000000 64.000000 100.000000 25.000000 36.000000 Σd2-590 2 10 10 39 29 total 2d-62 mean dbar- degree of freedom -n-1 Std deviaiton Sp-V(Ed2-(2d)2/n)/(n-1) std error-SeSo/Vn - 8.857 6.000 2.6095 0.986 for 95% CI; and 6 degree of freedom, value of t- therefore confidence interval- margin of errror std error- lower confidence limit upper confidence limit 2.447 sample mean-/+t*std error 2.413 6.444 11.271

from above 95% CI =6.44 ; 11.27

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