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QUESTION

PART A

Suppose you want to determine whether the brand of laundry detergent used and the temperature affects the amount of dirt removed from your laundry. You buy two different Brand of Detergent (A and B) and choose three different Temperature (cold, warm and hot). Four laundry loads were washed for each combination of detergent and temperature. The amount of dirt removed from each load was recorded. The partial ANOVA table is given below. Source DF SS MS F Brand (a) 20 20 . V Temperature (b) 80 40 . V Brand* Temperature (C) 30 15 . V Error (d) 72 4 Total (e) 202 Fill in DF in the ANOVA table. O (a) = 2, (b) = 3, (c) = 6, (d) = 13, (e ) = 24 O (a) = 1, (b) = 2, (c) = 2, (d) = 1, (e) = 6 O (a) = 1, (b) = 2, (c) = 2, (d) = 18, (e) = 23 (b) = 12Continue to consider Question 14. State the null and alternative hypotheses if you want to test if there is an interaction effect between the brand of detergent and the temperature in the mean amount of removed dirt. H0: There is no interaction between brands and temperatures; Ha: There is an interaction between brands and temperatures H0: There is an interaction between brands and temperatures; Ha: There is no interaction between brands and temperatures H03 muA=muB, Ha: muA is not equal to muB H0: mu1=mu2=mu3, Ha: At least two mu's are different Continue to consider Question 14. Find the value of test statistic of the test in Question 15. 10 3.75 Continue to consider Question 14. Using a 0.10 level of significance, find rejection region. OF > 9.00 OF > 8.53 OF > 2.62 OF > 3.10Continue to consider Question 14. What is your conclusion at 0.10 level of significance? O Reject HO. Sufficient evidence of an interaction between brands and temperature. O Do not reject HO. Insufficient evidence of an interaction between brands and temperature. O Do not reject HO. Insufficient evidence of a difference between two brands of detergent. O Reject HO. Sufficient evidence of a difference between two brands of detergent