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Coasters again.
Given Exercise examined the association between the Duration of a roller coaster ride and the height of its initial Drop, reporting that Write a sentence (in context, of course) summarizing what the R2 says about this regression
Exercise:Roller coaster. People who responded to a July 2004 Discovery Channel poll named the 10 best roller coasters in the United States. A table in the last chapter's exercises shows the length of the initial drop (in feet) and the duration of the ride (in seconds). A regression to predict Duration from Drop has R2 = 12.4%.
a) What are the variables and units in this regression?
b) What units does the slope have?
c) Do you think the slope is positive or negative? Explain.
what is the area under the normal curve between z 0.0 and z 1.79?a 0.4633b 0.0367c 0.9599d
The heights of all female college basketball players produce a distribution
What are some critical decisions involved in selecting an appropriate measurment scale? How might these decisions influence the research design?
What are different ways you can increase physical activity with an obese child in a classroom.
a consumer advocate wants to find out if motivational speakers can actually improve peoples earning power. he randomly
Does the average IQ for residents of a state vary with the amount that the state spends on education? Seven of the 50 U.S. states were randomly selected.
it is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and
find the probability that a card drawn from a standard deck of playing cards will be either a four or a
Find that the mean weight in the sample is 308 pounds.The standard deviation is 23. Using significance level of .01 test the null hypothesis using 5-step procedure.
physicians at a clinic gave what they thought were drugs to 940 patients. although the doctors later learned that the
You just finished getting your data, made sure there were no fliers and the data was correct You created a mean and standard deviation and ran your Z test at the 0.05 alpha Your decision rule is 1.645 and your Z test statistic ( step 3 ) is 1.647
1.makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the
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