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An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.
question 1 variable xx lt- c3 4 8 4 2 1 0 6 variable yy lt- c1 2 4 2 2 0 1 4 calculate z-scores for all values in the
Movie Budgets. How does the cost of a movie depend on its length? Data on the cost (millions of dollars) and the running time (minutes) for 29 films of 2005 are provided in the SPSS data set called Movie_budgets.sav (found on your class site..
Filtering and Summarizing Data
A company's stock price rose 362.7% in 2004, but dropped 78.0 in 2005. a. Compute the geometric mean rate of return for the two year period 2004-2005. (Hint: Denote a decrease of 78.0% by -0.78) b. If someone purchased $1,000 of the company's stock..
Observed Treatment Success
Perform exploratory data analysis on the relevant variables in the dataset. When possible, include appropriate graphs to help illustrate the dataset.
Davids ipod has about 10000 songs.the distribution of the play times for these songs is heavily skewed to the right with mean of 225 seconds and a standard deviation of 60 seconds. Suppose we choose an srs of 10 songs from this population and ..
What is the mean number of ducks that are killed and what is the expected number of hunters who hit the duck they aim at?
Compute expected frequencies for each of the cells in the table in part c). Do you feel that the exponential distribution provides an adequate description of these data?
use the table below for questions 1-4.cust idorder idshipping costdelivery methoddelivery time hrscustomer
q1.in the work represented in the image below describe how each of the following manifest if at alla.nbsp awkward
Which of the following may be considered a variable
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