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To conduct the experiment, the team drove 50 volunteers, one at a time, to a flea market in a van, and one of the team members, would either yawn (treatment) or not yawn (no treatment) during the ride. It was randomly determined ahead of time whether or not Kari yawned. Therefore, the 50 people were split into two randomly assigned groups.
Use MegaStat's output for simple linear regression to determine the regression equation
Find the correlation of log(GDPPC) with HDI for all 172 countries. Find the correlation for only the 141 Medium- and High-development countries. Which is higher? Which relationship is straighter?
Of the drivers who stop at a gas station, 92% purchase gasoline, and 6% purchase both gasoline and oil. A total of 7% purchase oil.
A student has failed to study for a true-false test and guesses at every one of the 10 questions. If the passing grade is 8 correct answers.
Do you think a sample of 25 is large enough to give them the margin of error they want? If not, how large a sample do you suggest they take?
Draw a normal curve on the diagram below with the parameters labeled. For the standard deviation, mark off one "sigma" to either side of the mean.
Can the font used in a packaged product affect our perception of the product's healthiness? It was hypothesized that use of a natural font.
the following sample of heights was taken from 7 cans off the assembly line12.9 12.9 12.8 12.9 13.4 13.2 12.6build a 90
A doctor id measuring children's heights to the nearest 1/2 inch and obtains scores such as 40.0, 40.5, 41.0, and so on. What are the real limits for a score
the sample space of equally likely outcomes for the experiment of rolling two fair dice is
a.) What is the prevalence of Hypertension at the start of the trial? ______% b.) What is the Prevalence of Hypertension at the end of the trial?_______%
The Rate of Return for firms on the stock market is about 8% on average(the mean) with a standard deviation of 4%.
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