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Does including a gift with a request for a donation affect the proportion who will make a donation? This question was investigated in a study described in the report "Gift-Exchange in the Field" (Institute for the Study of Labor, 2007). In this study, letters were sent to a large number of potential donors in Germany. The letter requested a donation for funding schools in Bangladesh. Those who were to receive the letter were assigned at random to one of three groups. Those in the first group received the letter with no gift. Those in the second group received a letter that included a small gift (a postcard), and those in the third group received a letter with a larger gift (four postcards). The response of interest was whether or not a letter resulted in a donation.
Simulate a completely random process of length 48 with independent, normal values. Plot the time series plot. Does it look "random"? Repeat this exercise several times with a new simulation each time.
1. a batch of 100 motors has been manufactured and andy and bob are applying a standard stress test to them. andy is
In short presentation, you will be describing an example that uses discrete probabilities or distributions.
Construct the following syllogisms- An unconditionally valid syllogism in the first figure with a particular affirmative conclusion and these terms: major-people incapable of objectivity; minor-Supreme Court justices; middle-lockstep ideologues.
A chocolate bar is considered underweight if it weighs less than 8.0 oz. What proportion of chocolate bars weighs less than 8.0 oz?
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
When do researchers use regression analysis?- What is multiple regression analysis?- Distinguish among simultaneous, stepwise, and hierarchical regression.
A securities analyst wants to estimate the average percentage of institutional holding of all publicly traded stocks in the United States.
box 1 contains 1000 bulbs of which 10 are defective. box 2 contains 2000 bulbs of which 5 are defective. two bulbs are
Run the simple linear regression and give the equation of the least-squares regression line
An earthquake with magnitude of 1.0 to 4.0 is considered weak and generally causes minor or no damage. Is there any evidence to suggest the true mean magnitude of earthquakes is greater than 1.0?
Suppose an unfair coin comes up tails 42% of the time if it is flipped. If the coin is flipped 13 times, what is the probability that?
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