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A paticle starts at (0,0) and moves in one-unit independed steps with equal probabilites of 1/4 in each of the four directions: North, south, east, and west. Let S equal the east-west position and T the north-south position after n steps.
a, Definde the joint pmf of S and T with n = 3. On a 2D graph, give the probabilities of the joint pmf and the marginal pmfs
b. Let X = S + 3 and Y = T + 3. How are X and Y distributed?
Assume that ages at onset of this disease are normally distributed for each gender, do not assume the population variances are equal. What are the appropriate null and alternative hypotheses?
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
A researcher claims that the average age of people who buy theatre tickets is 51. A sample of 30 is selected and their ages are recorded as shown below.
If I have 3 tables in the classroom with 16 girls and 8 boys in the class, what are the chances of 8 girls sitting at one table when seats are assigned randomly?
In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents
What is the major difference between finding significance and confidence intervals using population samples or using population proportions?
Hypothesis test for one population mean - What is the alternative hypothesis and What is the null hypothesis?
given the sample information in the following table regarding public opinion on gun control who is more likely to favor
when is it appropriate to use an anova? what is the key piece of information you must know in order to
Conduct the following test using 95% level of confidence.
According to the Bureau of Economic Analysis, the savings rate of American households, defined as a percentage of the disposable personal income, was 4.20% in 2009.
for each research situation described below decide what statistical procedure would most likely be used to answer the
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