Question

PART A

Does Miracle Gro® ("a plant growth enhancer") improve the growth of plants better than just water? One sample of n = 15 plants is given Miracle Gro® for a week and they grow a mean of 4.4". A second sample of n = 15 plants is given just water for a week and they grow a mean of 2.9".

-Describe the independent variable or population of interest:

-Describe the dependent variable:

-Write the null hypothesis in words:

-What type of t-test is appropriate here: single-sample or independent-samples:

PART B

A fruit company that sells peaches has used a preservative and canning process that is known to keep the peaches "fresh" for 700 days. The research and development folks at the company create a new preservative and add it to 100 cans to see if it keeps the product fresh for a longer period than the old preservative.

-Describe the independent variable or population of interest:

-Describe the dependent variable:

-Write the null hypothesis in words:

-What type of t-test is appropriate here: single-sample or independent-samples:

Answer 1

1.