5.5 In a comparison of the cleaning action of four detergents, 20 pieces of white cloth were first soiled with India ink. The cloths were then washed under controlled conditions with 5 pieces washed by each of the detergents. Unfortunately, three pieces of cloth were 'lost' in the course of the experiment. Whiteness readings, made on the 17 remaining pieces of cloth, are shown below. Detergent A BC D 77 74 73 76 81 66 78 85 61 58 57 77 76 69 64 69 63 Assuming all whiteness readings to be normally distributed with common variance, test the hypothesis, with a = 0.05, of no difference between the four brands as regards mean whiteness readings after washing. Ho: H₂₁: n₁ SST=86362- SSB = A Test statistic: B 5 3 5 364 198 340 Σ.Σ.Χ. =86362 Decision: Conclusion: 1204² 17 Degrees of freedom: Rejection region: C -(364² 198² 340² 302²) + + + 5 3 5 4 SSW1090.47-216.67=873.80 -=1090.47 D 4 302 Total 17=n 1204 = T 1204² 17 -=216.67 (1) (1) (1) દર ર

5.5 In a comparison of the cleaning action of four detergents, 20 pieces of white cloth were first soiled with India ink. The cloths were then washed under controlled conditions with 5 pieces washed by each of the detergents. Unfortunately, three pieces of cloth were 'lost' in the course of the experiment. Whiteness readings, made on the 17 remaining pieces of cloth, are shown below. Detergent A BC D 77 74 73 76 81 66 78 85 61 58 57 77 76 69 64 69 63 Assuming all whiteness readings to be normally distributed with common variance, test the hypothesis, with a = 0.05, of no difference between the four brands as regards mean whiteness readings after washing. Ho: H₂₁: n₁ SST=86362- SSB = A Test statistic: B 5 3 5 364 198 340 Σ.Σ.Χ. =86362 Decision: Conclusion: 1204² 17 Degrees of freedom: Rejection region: C -(364² 198² 340² 302²) + + + 5 3 5 4 SSW1090.47-216.67=873.80 -=1090.47 D 4 302 Total 17=n 1204 = T 1204² 17 -=216.67 (1) (1) (1) દર ર

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)

6th Edition

ISBN:9781337111348

Author:Bruce Crauder, Benny Evans, Alan Noell

Publisher:Bruce Crauder, Benny Evans, Alan Noell

Chapter5: A Survey Of Other Common Functions

Section5.3: Modeling Data With Power Functions

Problem 6E: Urban Travel Times Population of cities and driving times are related, as shown in the accompanying...

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Marine biologists have noticed that the color of the outermost growth band on a clam tends to be related to the time of year in which the clam dies. A biologist conducted a small investigation of whether this is true for the species Protothaca staminea. She collected a sample of 50 clam shells in February and 27 clam shells in March. 15 of the shells from February had a dark color on the outermost growth band, whereas 8 of the shells from March had a dark color on the outermost growth band. Carry out a hypothesis test to see if there is a difference in the proportion of shells with a dark outermost growth band between the two months. The point estimate for the true difference in proportion of dark growth bands between February and March is:
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