The R&D department of a paint company has developed an additive that it hopes will increase the ability of the company's stain for outdoor decks to resist water absorption. The current formulation of the stain has a mean absorption rate of 35 units. Before changing the stain, a study was designed to evaluate whether the mean absorption rate of the stain with the additive was decreased from the current rate of 35 units. The stain with the additive was applied to 50 pieces of decking material. The resulting data were summarized to ỹ = 33.6 ands =9.2. a. Is there substantial evidence ( a =0.01) that the additive reduces the mean absorption from its current value?

MATLAB: An Introduction with Applications
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The R&D department of a paint company has developed an additive that it hopes will increase
the ability of the company's stain for outdoor decks to resist water absorption. The current
formulation of the stain has a mean absorption rate of 35 units. Before changing the stain, a
study was designed to evaluate whether the mean absorption rate of the stain with the additive
was decreased from the current rate of 35 units. The stain with the additive was applied to 50
pieces of decking material. The resulting data were summarized to j = 33.6 and s = 9.2.
a. Is there substantial evidence (a = 0.01) that the additive reduces the mean absorption from
its current value?
Transcribed Image Text:The R&D department of a paint company has developed an additive that it hopes will increase the ability of the company's stain for outdoor decks to resist water absorption. The current formulation of the stain has a mean absorption rate of 35 units. Before changing the stain, a study was designed to evaluate whether the mean absorption rate of the stain with the additive was decreased from the current rate of 35 units. The stain with the additive was applied to 50 pieces of decking material. The resulting data were summarized to j = 33.6 and s = 9.2. a. Is there substantial evidence (a = 0.01) that the additive reduces the mean absorption from its current value?
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