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These data represent the ages of drivers and the number of accidents reported for each age group in Pennsylvania for a selected year. (Age, Number of Accidents) (16, 6605), (17, 8932), (18, 8506), (19, 7349), (20, 6458), (21, 5974). Find the equation of the regression line for the given data.
Blood pressure measurements on adult males 30-39 years of age were obtained in a survey of a representative sample of Twin Cities households. To compare the frequency of hypertension in the white and non-white population surveyed, the most appropr..
Findout the percentage of trainees earns less than $900 a month utilizing normal distribution.What percentage of trainees earns less than $900 a month?
Cumulative frequency distribution, histogram, ogive and stem and leaf display. Calculate appropriate summary statistics. Incorporate these graphs and statistics into a well written summary
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
A recent study of 25 students showed that they spent an average of $18.53 for gasoline per week. the standard deviation of the sample was $3.00. find the 95% confidence interval of the true mean.
Compute the test statistic for the goodness of fit test. At 95% confidence using the p-value approach, test the hypotheses. What do you conclude about the distribution?
Engineers hoped to base their decision on re- actions of 50 drivers, but time and budget constraints may force them to cut back to 20. How would this influence the power of the test? Describe.
Which statement about re-expressing data is not true? I. Unimodal distributions that are skewed to the right will be made more symmetric by taking the square root of the variable.
How should she proceed? What additional data (if any) is needed? Which statistical analysis technique should be used? Can an analysis be performed? Why or why not?
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
A soft-drink manufacturer claims that its 12-ounce cans do not contain, on average, more than 30 calories. A random sample of 16 cans of this soft drink, which were checked for calories
Using an investment game, the study demonstrated that people who inhaled oxytocin were more likely to give their money to a trustee compared to people who inhaled an inactive placebo. For this experimental study, identify the independent variable a..
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