Question: A consumer testing group compared two leading laundry detergents to determine which got laundry whiter. White towels that had been subjected to a variety of

A consumer testing group compared two leading laundry detergents to determine which got laundry whiter. White towels that had been subjected to a variety of filthy treatments were randomly assigned to one of the two detergents. After washing, each set of towels was tested with a photometer for the amount of light reflected (testing their cleanliness). What is the statistical test that should be used to compare the two detergents? Assume the amount of light reflected is symmetrically distributed. Question 1 options: independent samples t-test paired-samples t-test One-way ANOVA Wilcoxon signed-rank test Pearson correlation coefficient

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