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Question: Modalities. A survey of athletic trainers (Scott F. Nadler, Michael Prybicien, Gerard A. Malanga, and Dan Sicher. "Complications from Therapeutic Modalities: Results of a National Survey of Athletic Trainers." Archives of Physical Medical Rehabilitation 84 [June 2003]) asked what modalities (treatment methods such as ice, whirlpool, ultrasound, or exercise) they commonly use to treat injuries. Respondents were each asked to list three modalities. The article included the following figure reporting the modalities used:
a) What problems do you see with the graph?
b) Consider the percentages for the named modalities. Do you see anything odd about them?
What is the difference between simple linear and multiple regressions? Give an example of a situation where linear regression might be useful?
a coin is flipped. if a heads is flipped then the coin is flipped 2 more times and the number of heads flipped is noted
Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
what is the value of the t score for a 98 confidence interval if we take a sample of size 22?a. 2.845b. 2.518c. 2.861d.
a truck repair facility has room to work on 5 trucks at a time. the company has 50 trucks out in the field eah day. the
Suppose you have fit a linear model to some data and now take a look at the residuals. For each of the following possible residuals plots, tell whether you would try a re-expression and, if so, why.
Total housing costs as a percent of monthly income, five years ago and now. The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
Can we conclude that employee preferences for the health care plans have changed from last year? Use α = 0.05. What is the p-value?
which of the following is not a property of all normal distributions?a. the mean equals the median.b. the distribution
Computer anxiety and usage frequency. Using a rating scale, Tekinarslan (2008) measured computer anxiety among university students who use the computer.
Use Hypothesis testing to compute te correlation between these two variables and these it for significance. Test at .01 level of significance.
let x and y be independent and identically distributed random variables with common standard normal pdf offz
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