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In a cross sectional study of bicycle helmet use, authors were interested in assessing neighborhood socio-economic status (as measured by percentage of school children receiving free or reduced-fee lunches at school) and percentage of bicycle rider wearing a helmet. If the assumptions of the test were met, what is the appropriate statistical test to perform:
a. two independent sample t-test
b. Wilcoxon sign-rank test
c. correlation analysis
d. chi-square one-sample test of the variance
e. none of the above
Interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is the chance? Why is your sample not an SRS?
for a certain musician his favorite brand of guitar picks is far more likely to chip accidentally and become useless
born between 1980 and 1990 generation next have lived in a post-cold war world and a time of relative economic
The standard deviation of the population is 0.6 ounces. Which of the following is the 95% confidence interval for the mean weight per white mice?
a random sample of 500 shoppers at sharpstown mall found that 120 favored longer shopping hours. is this sufficient
you just saw an ad on television that states the majority of the population would vote to make smoking illegal. the
In a random sample of 200 of the contributions to a local station, 42% were for less than $20, 43% were for $20-$50, and 15% were over $50. At the 0.05 level, does the local station's distribution of contributions differ significantly from that ex..
Assume that the event "Mary takes Mathematics 23 and Government 35" is more likely than the event "Mary takes Mathematics 23." Why are we not making this fallacy here?
Could such a low average be considered just bad luck or should he be sent back to the minor leagues? Comment on the assumption of Bernoulli trials in this situation.
1. The manager of Erehwon police department motor pool wants to develop a forecast model for annual maintenance costs on police cars, based on mileage in the past year, and age of cars. The following data have been collected for eight different car..
What are some challenges that local law enforcement officers face? What do law enforcement officers need to combat computer crimes at the state and local levels?
the total claim amount for a health insurance policy follows a distribution with density function fx 11000e-x1000 for
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