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Explaining Variation in Bid/Ask Spreads Go to the currency converter at finance.yahoo.com/currency and determine the bid/ask spread for the euro. Then determine the bid/ask spread for a currency in a less developed country. What do you think is the main reason for the difference in the bid/ask spreads between these two currencies?
nine college students had eaten the following number of times at a fast food restaurant for dinner in the last ten
Heights of college-aged women are approximately bell-shaped and symmetric, with almost all of them (95%) falling between 58" and 72". Find the approximate values of the mean and standard deviation.
a person has applied for positions at company a company b and company c. the probability of obtaining an offer from
as we all know correlation does not imply causation. on other words if x and y are correlated it doesnt necessarily
Assuming that a difference (Δ) of 2 lbs. in the mean was important to detect, a maximum Type I Error (α) level of 5%, and the desire to run a two-tailed test, then:
FBI Report Do greater universities tend to have more property crime, would you speek that the correlation is low, moderate or high
in a study to investigate the effect of the color paper blue green orange on response rates for questionnaires
Construct a 95% confidence interval for the unknown mean of the pop ulation from which the above sample was obtained. Construct an interval that with 95% confidence will contain 99% of the population values.
freshmen, 15 sophomores, 10 juniors, and 5 seniors. One student is randomly selected to deliver a petition to the school administration. Call A the event that occurs of the student is a freshmen and B the event that the student is a sophomore.
An article in Money compares investment in an income annuity, offered by insurance companies, and a mix of low-cost mutual funds.6 Suppose the following data are annualized returns (in percent) randomly sampled from these two kinds of investments.
One prominent physician claims that 70% of chose with lung cancer are heavy smokers. If his assertion is correct. find the probability that more than half are heavy smokers.
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
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