Experimental Design and Statistics Question

If our dataset included 100 possible explanatory variables, we would expect to see statistical significance for 5 comparisons, by chance alone. (That is 5%, after all, and we have set our alpha value at 5%!) Given this, explain why it is important to clearly state your null hypothesis, plan your study design, and draw your predicted results before you conduct your experiment.

Technological innovations in oil drilling have decreased the cost of producing propane gas.

a. Show this change graphically in a supply and demand diagram for propane. Clearly label your curves and equilibrium price and quantity both before and after the change in technology

.b. If the demand for propane increases significantly during the summer as more people grill outside, what will be the net impact of this change in demand combined with the change from (a) on market equilibrium price and quantity of propane?

The general fund of the Village of Beantown borrowed $100,000 on July 15, 2019, from the local bank in order to pay for government services provided to its citizens before the first collection of its property tax levy. After collecting the first property tax installment, Beantown paid the local bank $102,000 on September 12, 2019.

Required:

Make the village’s general fund journal entry to record the payment to the bank on September 12

1. For the following experimental designs, indicate whether independent-samples or paired-samples t-test is appropriate:

a) Weight is obtained for each subject before and after Dr. Nogani's new treatment. The hypothesis to be tested is that the treatment has no effect on weight loss.

b) Elephants are randomly selected from a jungle and Trunkgrol is administered to one group of elephants and Trunkgro2 to the other. The hypothesis to be tested is that both agents are equally effective in promoting trunk growth.

A composition teacher wishes to see whether a new grammar program will reduce the number of grammatical errors her student make when writing an essay. the data are shown below. At a=0.05 can it be concluded that the number of errors has been reduced?

Student- 1, 2, 3, 4, 5, 6,

Errors before- 12 9 0 5 4 3

Errors after - 9 6 1 1 2 5

A pizza pan is removed at 4:00 PM from an oven whose temperature is fixed at 450 degrees F into a room that is a constant 74 degrees F. After 5​ minutes, the pizza pan is at 300 degrees F.

a. At what time is the temperature of the pan 125 Degrees F

b. Determine the time that needs to elapse before the pan is 200 Degrees F

c. What do you notice about the temperature as time passes?

Multi-wells are used for dewatering at an excavation site. The dimension of the excavation pit is 150 m × 200 m. The height of the phreatic level above the impermeable layer before pumping is 15 m. The height of the phreatic level at the center of excavation pit after pumping is 6 m. The soil permeability k = 2.3×10-5 m/s. The wells have a diameter of 200 mm. Determine the number of wells required for this dewatering project

Question 2 – Government Intervention as Natural Monopoly Regulation

Sometimes governments intervene with the markets; the reason for the intervention might be a concern about allocative efficiency, or production inefficiency or some “fairness” issue.

Your task here is to explain the motivation for government allowing only a single firm in naturally monopolistic industries and yet later regulating the price of this firm. Analyze the situation before and after government intervention, and then conclude by referring to the possible reason for intervention.

Wandel Inc. has forecasted sales of $300,000. The firm's fixed operating costs total $75,000 and its variable operating costs are equal to 70% of this sales level. The company needs to pay $12,000 in interest each period. Its tax rate is 40% and it has 10,000 shares.

a) Compute the earnings before interest and taxes (EBIT) for a sales level of $300,000

b) Compute Earnings after taxes and compute the EPS for that sales level.