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Make it an experiment! In the following observational studies, describe changes that could be made to the data collection process that would result in an experiment rather than an observational study. Also, offer suggestions about unseen biases or lurking variables that may be present in the studies as they are described here.
(a) A friend of yours likes to play Texas hold 'em. Every time that he tells you about his playing, he says that he won.
(b) In an introductory statistics class you notice that the students who sit in the first two rows of seats had a higher score on the first exam than the other students in the class.
What is the probability that at most 20 people liked the movie?-What is the probability that at least 25 people liked the movie?
Develop a seasonally adjusted forecast model for these sandwich sales data. Forecast demand for each season for 2004 using a linear trend line estimate for sales in 2004. Do the data appear to have a seasonal pattern?
find the minimum shape size n needed to estimate mu find the given values of c s and ec0.98 s9.7 e1assume that the
question average adult american are about one inch taller but nearly a whopping 25 pounds heavier than they were in
Modify the spreadsheet above to accommodate the possibility of v not equal to 1. Use excel data table (1 dimensional) to check the sensitivity of the portfolio's std dev as a function of v. Vary v from .05 to 1.5 in .05 increments.
a polling company reported that 27 of 2286 surveyed adults said that they play football.a. what is the exact value that
Give the formula for the proper statistic to use, and also the p-value and An experiment was conducted to compare the weights of the combs of roosters fed two different vitamin-supplemented diets
On the following terms could you please give my an English text description - in your own words. 1. Algorithm:
If the test consists of 100 trials, how many would this person need to get right in order to convince you that ESP may actually exist? Explain.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Illustrate a quantitative assessment of what our charts would look like and what these new targets would do to our operations.
given the following estimates of various components of genetic variationva 90 vd 50 vi 35 ve 125what is
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