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Compare and contrast a firm-fixed-price contract to a time and materials contract. When would each be appropriate for a given project?
Please indicate the sampling design and data collection tool(s) used in the following studies.
If X and Y are statistically independent random variables both with probability density function f(t)=e^(-t) I[0, +infinity](t) , where I is the indicator function of t. Find the probability density of the variable Z=Squareroot(Y/X).
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribtion with a standard deviat..
Using a random sample of 100 business meetings, the researchers found that the average meeting in this sample started 4 minutes late and the standard deviation.
Using the 0.05 level of significance, is there any evidence of a difference in the average life of bulbs produced by the two types of machines?
If a new random sample of 1000 adults is taken from the same population, explain whether each of the following would change the population proportion, p.
If we use the Empirical Rule, sales will be between what two values on 68 percent of the days? Sales will be between what two values on 95 percent of the days?
Design a 95 percent confidence interval for the proportion of defectives in a large lot, if a sample of 200 showed 12 defectives.
The figure shows the amount of money won by people playing blackjack and the amount of tips they gave to the dealer (who was a statistics student), in dollars.
Describe the sampling distribution of X. - What is the mean of this sampling distribution?- What is the standard deviation of this sampling distribution?
A survey of 200 recent graduates from your school revealed that 80 students had jobs. At the .02 significance level, can we conclude that a larger proportion of students at your school have jobs?
Domestic Goats Follow Gaze Direction and Use Social Cues in An Object Choice Task," published online in Animal Behavior in January 2005
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