Suppose you are a botanist studying freshwater plants. During a stream quality survey, you noticed that the size of Pistia stratiotes, commonly known as water lettuce, in rivers which are thermally polluted with hot water from a power plant, generally seemed to be smaller than in normal, cooler rivers. You decide to test a hypothesis that water temperature impacts plant growth. You collect plants from both rivers and then measure the dry weight. The weights are provided below, in oz.
Plants from hot river: 2.5, 2.7, 2.3, 2.4, 2.5, 2.5, 1.9, 2.4, 2.6, 2.3, 2.5, 2.4, 2.5, 2.6, 2.3
Plants from cool river: 4.9, 4.7, 5.0, 4.9, 4.8, 4.9, 4.9, 4.7, 5.0, 4.6, 4.8, 5.0, 4.9
how can I Calculate the mean body lengths of the two samples of crayfish, as well as the standard deviations, variances and sample sizes. Use the correct number of significant digits.
Mean. Standard deviation Variance Sample size (N)
Hot river crayfish ? ? ? ?
Cool river crayfish ? ? ? ?