Imagine you are performing an experiment on the growth of aspen seedlings under different temperature conditions to better understand how aspen forests may be impacted by changes to the climate.   In your experiment, aspen seedlings are grown in a temperature controlled greenhouse at either 20° C or 30° C. Seedlings are measured for height and number of new leaves on a weekly basis.   Your hypotheses are as follows:   Alternative hypothesis: Temperature influences how quickly aspen seedlings grow.   Null hypothesis: Temperature has no impact on how quickly aspen seedlings grow.   You perform a t-test to compare the average weekly growth for seedlings in the 20° C treatment versus the 30° C treatment. You get a p-value of 0.03.   How likely is it that the difference between the two averages was due to random chance?   What does this information tell you about your hypotheses?

A gardening company would like to predict the density of the weed population in a yard before it is sprayed with pesticide. The yard measures 200 cm × 100 cm. The gardener  places four 2.0 cm × 1.0 cm quadrats randomly in the park, and calculates the weed counts of 22, 46, 32 and 40 weeds in the 4 quadrats. Solve for the density of the weed population. Please show all your work

A scientist is studying the effect a new fertilizer has on the root growth of bean seedlings. Three groups of plants are grown in the same location in a greenhouse, each receiving the same amount of sunlight and water every day. The scientist measures the length of the roots for each plant every day. The scientist then calculates the mean for each group for five days. The results are shown in the following table. Fertilizer Experiment Data Table A What is the independent variable in this experiment? B с Day 1 Day 2 Day 3 Day 4 Day 5 D Group 1 0 mg 3.0 cm 3.2 cm 3.4 cm 3.7 cm 4.2 cm the amount of water given to each plant the amount of fertilizer given to each plant Group 2 5 mg 2.7 cm 3.1 cm 3.7 cm 4.2 cm 4.6 cm the place in the greenhouse where each plant was placed the type of soil used for each plant Group 3 10 mg 2.9 cm 3.3 cm 3.7 cm 3.9 cm 4.1 cm

Scenario: You have been hired by an electric utility company whose stockholders are really pressing the company on ESG matters (environmental, social, governance). The company owns thousands of acres of land surrounding one of its powerplants and leases much of this land to local farmers for agriculture. However, local environmental groups have been stating concerns in the local newspaper about the loss of insect biodiversity on in meadows surrounding the agricultural activities. You have been tasked by the company to develop an experiment to investigate whether a loss of insect biodiversity is occurring in these meadows because of these agricultural activities. Action Steps: Propose a coherent and testable hypothesis that captures some aspect of this concern. Identify the independent and dependent variables in this experiment. Identify any possible confounding variables that might influence your experiment. Identify appropriate controls for your experiment. Demonstrate how you…