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A dependent samples t test is typically more powerful than an independent samples t test because ?
a. reduces participant/subject variability between groups.b. has much higher degree of freedomc. uses twice as many scores in all calulations.d. has more participants in the study.
Beta random variable with mean 1/3 and variance 1/18. What is the probability that next month, the procurement office orders at least 7/12th of its purchase from this vendor?
Find the probability that he will answer all 10 questions correctly.
You just saw an ad on television that states the majority of the population would vote to make smoking illegal. The poll that is referenced shows 53% of those asked supported making smoking illegal.
A method of determining if relationships exist between two variables is:
In an article in Accounting and Business Research, Carslaw and Kaplan investigate factors that in?uence "audit delay" for ?rms in New Zealand.
Use the p value method to determine whether or not to accept or reject the null and alternate hypotheses.
A person purchased a slot machine and tested it by playing it 1,245 times. There are 10 different categories of outcomes, including no win, win jackpot, win with three balls, and so on.
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
The moment generating function of normal distributed random variable ,Y, with mean and variance .derive the moment generating function of X=-3Y+4.what is the distribution of X? why?
The event "the price of stock X has increased and the price of stock Y has not increased" may be written as??
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