Some bottles of bubble bath have gone past their expiration date. The employees want to know if the expired bubble bath produces a significantly different amount of bubbles. They know that a fresh bottle of bubble bath produces a 124 cubic inches (in3) of bubbles with a SD of 8 in3. After testing 16 bottles, they find the average expired bottle produces 130 in3 of bubbles. A) Select the correct hypothesis statements. a. Null hypothesis: population mean is equal to 124 cubic inches
Some bottles of bubble bath have gone past their expiration date. The employees want to know if the expired bubble bath produces a significantly different amount of bubbles. They know that a fresh bottle of bubble bath produces a 124 cubic inches (in3) of bubbles with a SD of 8 in3. After testing 16 bottles, they find the average expired bottle produces 130 in3 of bubbles.
A) Select the correct hypothesis statements.
a. Null hypothesis: population mean is equal to 124 cubic inches
b.Alternative hypothesis: population mean is equal to 124 cubic inches
c.Null hypothesis: population mean is not equal to 124 cubic inches
d.Alternative hypothesis: population mean is equal to 130 cubic inches
B) What is the effect size of the treatment using Cohen's d?
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