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A farmer wishes to determine the optimal level of a new fertilizer on his soybean
crop. Some factors that affect crop yield are fertilizer, precipitation, sunlight, method of tilling the soil, type of soil, plant and temperature. Many of these factors cannot be controlled or manipulated to increase crop yield, but the amount of fertilizer can be. An experiment is designed to study the effect of various amounts of fertilizer on crop yield. The soybean plants are randomly assigned to the different treatments.
Treatment A: 20 soybean plants receive no fertilizer
Treatment B: 20 soybean plants receive 2 teaspoons of fertilizer per gallon of water every 2 weeks
Treatment C: 20 soybean plants receive 4 teaspoons of fertilizer per gallon of water every 2 weeks
Diagram the experiment. Indicate the subjects of the experiment, the explanatory variable, and the response variable.
If 12 of them produce yr owers what is the probability that in the remaining 8 plants 4 produce yw owers, and 3 produce gr owers?
One group was enquired, questions what they saw. One group was enquired, "About how fast were cars going when they smashed into each other?"
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
A standard deviation of 20. If the seller wishes to have adequate stock 95% of the time, how many of the games must she keep on hand.
Can you conclude that u1 is not equal to u2 at alpha=.05? State the hypothesis in orders of 1-2. construct a 99% confidence interval for the difference in true means. State the confidence interval in terms of 2-1.
Discuss the link between the estimate and the parameter in the context of an hypothesis test. Be sure to reference the appropriate steps of the five step process in your response, based on the steps below:
To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
Using a significance level of 0.05, can we conclude from this information that the course is successful in improving individuals' knowledge of Web page design?
standard deviation= 2.5 ounces. Which of the following is true about the sampling distribution of the sample mean if a sample of size 15 is selected?
A social psychologist is studying college students attitudes toward drinking and driving. He is specifically interested in attitude change as a result of years in college and of viewing the consequences of drinking and driving accidents.
Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood.
If the Consumer Price Index in June 2006 was 159.3 (1982-84=100), what does this indicate about prices from 1982-84 to June 2006?
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