Crop yields per acre depend on many variables, but two obvious ones are fertilizer and weed control. In an effort to test the effects of various levels of fertilizer and of herbicide, researchers sel...
Problem 1-1 A farmer owns 450 acres of land. He is going to plant each acre with wheat or corn. Each acre planted with wheat yields $4000 profit, requires three workers, and requires two tons of fertilizer. Each acre planted with corn yields $2000 profit, requires two workers, and requires four tons of fertilizer. There are currently 1000 workers and 1200 tons of fertilizer available. To hedge against risk, the farmer wants to sure that the acres of wheat do...
The following table gives the bushels of corn per acre, y resulting from the use of the various amounts of fertilizer in pounds per acre, x, produced on a farm in each of 10 years from 1971 to 1980. Year n y x 1971 1 40 6 1972 2 44 10 1973 3 46 12 1974 4 48 14 1975 5 52 16 1976 6 58 18 1977 7 60 22 1978 8 68 24 1979 9 74 26 1980...
How does smoking affect testosterone levels in males? Here is some data, where testosterone was measured in 10 men randomly selected from each of 4 populations: nonsmoker former smoker light smoker heavy smoker 1 0.44 0.46 0.37 0.44 2 0.44 0.5 0.42 0.25 3 0.43 0.51 0.43 0.4 4 0.56 0.58 0.48 0.27 5 0.85 0.85 0.76 0.34 6 0.68 0.72 0.6 0.62 7 0.96 0.93 0.82 0.47 8 0.72 0.86 0.72 0.7 9 0.92 0.76 0.6 0.6 10 0.87...
a) Calculate the Pearson Correlation Coefficient for these two variables and b) test whether the correlation is significantly different from 0. Run the test at a 5% level of significance. Give each of the following for part b to receive full credit: 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value. You MUST show...
Sample ID Control Fertilizer Treatment 1 0.358 0.336 2 0.338 0.438 3 0.488 0.458 4 0.374 0.797 5 0.411 0.588 6 0.442 0.326 7 0.376 0.193 8 0.334 0.297 9 0.498 0.486 10 0.403 0.203 11 0.473 0.5 12 0.238 0.214 13 0.298 0.599 14 0.222 0.2 15 0.318 0.598 16 0.337 0.454 17 0.398 0.563 18 0.35 0.692 19 0.285 0.685 20 0.383 0.493 21 0.275 0.361 22 0.332 0.206 23 0.469 0.701 24 0.497 0.255 25 0.352 0.541...
Both the quality of the conversation and the misattribution of
arousal on the date influence romantic attraction. Researchers
examined the individual and combined effects of both of these
factors. Participants went on a date that consisted of either a
walk on a paved path in the woods (“standard” date) or Zip-lining
and walking across a very high rope bridge (“adventure” date). At
dinner following the activity, the conversation quality was either
“average” (pleasant but superficial) or more exceptional in which...
1. Convert 60 miles per hour into meters per second. 2. A student is trying to remember some formulas from geometry. In what follows, assume A is area, V is volume, and all other variables are lengths. Determine which formulas are dimensionally consistent. (c) V-0.5bh, (e) V nd 3. The length of a warchouse is measured to be 95.00m. The height of the roof is measured to be 1,350.00cm. The width is measured to be 0.0015km. Calculate the volume of...
The first two questions refer to the following information: Researchers developed an online tool to help ESL students learn prepositions and metaphors. A study measuring academic success in ESL students randomly sampled 100 Spanish speaking ESL students using traditional ESL classes and the new language tool and 81 Portuguese speaking ESL students using traditional ESL classes and the new language tool, and scored them on a common English fluency scale (higher score representing greater degree of fluency). The researchers suspected...
True/False (1 Point each) 1) When bond prices decrease, their yields to maturity increase. 2) The best forms of money and financial systems enjoy the benefits of trust, belief, and stability. 3) A fundamental function of a commercial bank is to take in deposits and make loans. 4) Traditional banks operate with low margins and high leverage. 5) Rates on bonds issued by a government can be negative. 6) ) The default risk premium is the same as the credit...
Except for a few pigeons, Central Park was deserted. Mist hung above the chilled grass. Patches of old snow, scattered here and there, looked like white puddles. The sun hung just above the horizon, casting red and orange streaks across low-hanging clouds. The portly, gray-haired gentleman jogging down the path looked out of place. For one thing, he was dressed in ordinary street clothes, not a sweat suit. Also, every few seconds, he looked anxiously back over his shoulder. Coming...