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Given that X‾ = 78, σ2 = 25, n = 10 and α = .05, test H0 : μ > 80, assuming observations are randomly sampled from a normal distribution. Also, draw the standard normal distribution indicating where Z and the critical value are located.
in a randomized comparative experiment on the effect of color on the performance of a cognitive task researchers
a fair coin is tossed 500 times. find the probability of obtaining more than 300 heads.a.0b.
At a 5% level of significance, is there evidence to conclude that the mean life is different from 375 hours?
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
what is the critical f value for a sample of four observations in the numerator and seven in the denominator? use a
find the mean variance and standard deviation for the following probability distributionxnbsp nbsppx0nbspnbsp
Recent crime reports indicate that 4.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
Serena Williams made a successful first serve 67% of the time in a Wimbledon finals match against her sister Venus. If she continues to serve at the same rate the next time they play and serves 6 times in the first game, determine the following pr..
A group of items of data have been found to be normally distributed with a mean of 80 and a standard deviation of 6. Please convert 80 to a z-score and show the calculation.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
What are the advantages and disadvantages of regression models in comparison to using a computerized regression routine? Give examples.
Table shows the tabulated frequencies based on responses to both questions. Does response speed influence overall satisfaction? Use α= 0.01. Find Cramer's index of association.
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