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Shyness on Facebook. Given the anonymity afforded to individuals in online interactions, researchers hypothesized that shy individuals might have more favorable attitudes toward Facebook, and that shyness might be positively correlated with time spent on Facebook. They also hypothesized that shy individuals might have fewer Facebook "friends" as they tend to have fewer friends than non-shy individuals have in the offline world. 103 undergraduate students at an Ontario university were surveyed via online questionnaires. The study states "Participants were recruited through the university's psychology participation pool. After indicating an interest in the study, participants were sent an e-mail containing the study's URL." Are the results of this study generalizable to the population of all Facebook users?
A random sample of 168 students was asked how many songs were in their digital music li- brary and what fraction of them was legally purchased. Overall, they reported having a total of 117,079 songs, of which 23.1% were legal. The music industry w..
A television rating agency produces the ratings of television shows by asking a random sample of about 5000 households with TV sets what shows they watch.
1. What is the uncertainty distribution for the number of spots on the up side when the die is thrown? Write down all of the possible outcomes and their probabilities. [Hint: The probabilities must add up to 1.] 2. Calculate the mean of the uncert..
Suppose the correlation between weight and height for adults is +.80. What proportion (or percentage) of the variability in weight can be explained by the relationship with height?
a medical inspector wants to estimate the overall average monthly occupancy rates of the cancer wards in 80 different
Choose any medical scientific study who applied a Bayer Theorem and write down the article information (title, author, location, and date) of the article
How has the use of fluoride in the community's water supply helped and it what ways has it been harmful?
a random sample of 2000 men and 2700 women in the age group of 18 to 25 were asked if they still live with their
For two samples from what are assumed to be normally distributed populations, the sample sizes and standard deviations are n1 5 28, s1 5 103.1, n2 5 41, and s2 5 133.5. At the 0.10 level of significance, test the null hypothesis that the populatio..
according to a december 2007 gallup poll 24 of american adults have visited a casino in the past 12 months. what is the
Define a token class Almost Reserved to be those identifiers that are not reserved words but that would be if a single character were changed. Why is it useful to know that an identifier is "almost" a reserved word?
Its mean is 139 and its standard deviation is 12. Approximately how many terms can you expect to find between the values of 115 and 163?
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