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A group of psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significanc
Assume that you're testing the hypotheses H0: p = .75 vs. HA: p > .75. A sample of size 100 results in sample proportion of .80. Determine the standard deviation of the sample proportion?
Determine the probability that he is a winner? Determine the expected number of bets before he reaches either $0 or $50
A survey of voter sentiment was conducted in four midcity political wards to compare the fraction of voters favoring candidate A. Random samples of 200 voters were polled in each of the four wards,
Test the following claim. Determine the null hypothesis, alternative hypothesis, test statistic, critical value, conclusion regarding the null hypothesis, and final conclusion that adress original c
Determine the exact multiplicity function g(N,n) giving the number of states with precisely n horizontal links? What is the exact probability P(n) to find the system in a state with n horizontal links
For a specific flight with 300 seats, find out the number of tickets which can be sold by the airline company so that the probability of overbooking the flight is around 31%.
Write the tree digram for a coin that tossed three times then list each of the 8 member of the sample space and define a random variable as equal to:
We want to design a new placebo-controlled trial to evaluate an experimental medication to increaselung capacity. The primary outcome is peak expiratory flow rate, a continuous varialb emeasured in
More recent methods do frequently rely on p-values. Why do you think that might be? What is the difference between a critical value and a test statistic?
The proportion of zeroes is then equated to the Poisson probability of zero, and the equation solved for the rate, . This estimates the average number of elements per quadrat, which can then be scal
A reading test was given to 4200 students. The test was quite normal with the mean=84 and s=12. If the test was standardized with new mean of 50 and s=10, What would raw score of 90 equal to?
The town officials recently undertook extensive campaign to encourage registered voters to participate in election process. They are interested in determining whether the promotional campaign actual
A random sample of 80 students was taken. Seventy percent of students in the sample passed the class. Test the hypothesis at the 1% level of significance. Determine the p-value and conclusion?
Past surveys reveal that 31 percent of tourists going to Las Vegas to gamble throughout a weekend more than $1,000. Management desires to update this percentage. Using the 99 percent confidence, man
When we say there is homogeneity of variance, what exactly are we saying? (You need to be very clear in specifying which variances you are talking about. Give your answer in words. No symbols please
Please compute the appropriate test statistic for this experiment; then determine the critical value; then come to a conclusion concerning the null hypothesis; and then state what the implications a
Determine the H0 and Ha. Calculate the test statistic. Determine the critical value? Do you reject or fail to reject the null hypothesis and why.
A public health biologist is comparing prevalance of flatworm parasites between populations who consume organic foods compared to those who consume traditionally farmed meats as well as produce. Fro
Show that the likelihood ratio test rejects H0 if either X ≥ c or X ≤ n -c. (Hint: When Ha is true, let θ denote the common value of p2, p4, and p6.)
Do the data provide sufficient evidence to point to that the diameters of ball-bearings produced by new procedure are more variable than those produced by old process? test at α=.01
There is a Box has 3 dimes and 4 quarters. you intent to choose three of these coins at random without replacement. Determine a random variable K as the total monetary value of three selected coins.
Failure in optical fibers employed in communications systems are typically due to a brittle fracture that grows in a complete crack, thereby disrupting transmission.
Failure in optical fibers used in communications systems are typically due to a brittle fracture that grows into a complete crack, thereby disrupting transmission.
A manufacturer is trying to decrease the defective rate of water filters employed in refrigerators. The current failure rate = 4%. In the new version the seal was changed; 300 filters were subjected