The history of Cuba in the last 50 years is noted for its revolution, which brought socialist principles and destroyed the capitalist infrastructure, including the wealth base of its richer inhabitants. From the readings on Cuban history and contemporary society—1) what can be interpreted as the positive social impacts of the revolution on Cuban society (e.g. via race, class, gender); 2) how have the Cuban films we have seen promote the positive impacts of the socialist revolution; and 3) would you say these portrayals are honest reflections of Cuban society or propaganda of the State? Use evidence to back up your assertions.

Consider the market for a good in which there are two income groups of buyers. There are 8 buyers with income $40 and 6 buyers with income $54. All buyers have the same utility function u = 20q − q 2 + m, where q denotes the amount of the good and m the money left after buying the good. Denote the price of the good by p. (a) [5 points] For each income group, determine the individual demand of a buyer. (b) [5 points] Find the market demand and draw the demand curve. (c) [5 points] Consider an individual buyer in income group $40. For the following prices, determine how much money is left with the buyer after buying the good: (i) p = 8, (ii) p = 13. (d) [5 points] Consider an individual buyer in income group $54. For the following prices, determine how much money is left with the buyer after buying the good: (i) p = 8, (ii) p = 13.

This is problem 6-9 from El-Wakil’s Powerplant Technology book -- consider for simplicity an ideal Rankine cycle with turbine inlet and exit steam at 2500 psia and 1000°F, and 1 psia, respectively, and no feedwater heating. The steam mass flow rate is 2x10⁶ lb_m/h. The plant has two-pass surface condenser with 45-ft-long 7/8-in 18-BWG-type 304 stainless steel tubes. Cooling water enters the tubes at 70°F and 7 ft/s. With no flows into the condenser other than turbine steam, find (a) the plant power, in megawatts, and efficiency and (b) the total number of tubes if the condenser terminal temperature difference is 8°F.

. You must use Excel (submit either a pdf, word or Excel file only).

. You must identify the 5 steps (you must address each in detail).

Problem: Use the given data to complete a t-test using Excel.

Question: Is there a difference in group means between the number of words spelled correctly for two groups of fourth graders?

Assume the following daily closings for the Dow Jones Industrial Average:

1. Calculate a four-day moving average for Days 4 through 12. Round your answers to two decimal places.

   Day	Moving average
   4
   5
   6
   7
   8
   9
   10
   11
   12

2. Assume that the index on Day 13 closes at 13,260. Would this signal a buy or sell decision?

   This would signal a (-Select-) buy sell Item 10 decision.

Researchers investigated the speed with which consumers decide to purchase a product. The researchers theorized that consumers with last names that begin with letters later in the alphabet will tend to acquire items faster than those whose last names begin with letters earlier in the alphabet - called the last name effect. MBA students were offered tickets to a basketball game. The first letter of the last name of respondents and their response times were noted. The researchers compared the response times for two​ groups: (1) those with last names beginning with a​ letter, A-​I, and​ (2) those with last names beginning a​ letter, R-Z. Summary statistics for the two groups are provided in the accompanying table. Complete parts a and b below. Sample Size A-I: 18 R-Z: 18 Mean Response Time (Minutes) A-I: 23.26 R-Z: 16.82 Standard Deviation (Minutes) A-I: 9.87 R-Z: 8.49

A. Construct a 90% Confidence Interval for the difference between the true mean response times for MBA students in the two groups.

B. Based on the interval, part A, which group has the shorter mean response time? Does this result support the researchers' last name effect theory? Explain.

PC.62 Trek is a manufacturing company that produces high-end bicycles. Their prime road bike, the MadOne, can be fully customized through a program called Project One. Last year they rolled out 1,270 bikes which sold on average for $7,900 and used the following inputs as found in the table below:

What was last year's single-factor productivity for Trek in terms of rubber (not dollars)? (Display your answer to four decimal places.)


What was last year's single-factor productivity for Trek in terms of OCLV Carbon (input and output units, not dollars)? (Display your answer to four decimal places.)


What was last year's multi-factor productivity for Trek in terms of dollars? (In other words, how many dollars of revenue were generated for each dollar of input? Display your answer to two decimal places.)
   

Suppose in the coming year they expect their multi-factor productivity to increase by 10% over last year (what you just computed). What should be their multi-factor productivity in the coming year? (Display your answer to two decimal places.)