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A fair coin is tossed four times and X is number of heads on first three tosses and Y on last three. What is the joint probability mass function of x and y? What is the marginal pmf? Are X and Y independent?
If 64 students were randomly sampled, the probability that the sample mean of the sampled students exceeds 73.5 minutes is approximately 0.
Researcher is interested in testing whether there are differences in mean between population one and population two.
The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
You've two separate sets of data. From one set you calculate the standard error to be 500. From the other set, the standard error was 5.
The State Department of education requires local school districts to keep records on all students within their district. Determine if the following items are categorical or numeric variables.
Suppose you were to cut up the directory and pull out one listing at random to contact.
The cost for the conference room, instructor compensation, lab assistants, and promotion is $9,600. Micromedia rents computers for its seminars at a cost of $60 per computer per day. Question: find the breakeven point for this problem using Excel.
Suppose you randomly choose a sample of 30 observations from a normal distribution. You then use those observations to estimate the mean of the population.
Now we would like to evaluate regression equation for X using Y as independent variable.
State the null and alternative hypotheses for the ANOVA (include definitions of parameters). What assumptions do we need to proceed with ANOVA?
Developing project network using AOA that determines completion times.
An owner of a fast food restaurant reported to corporate headquarters that the average bill paid by his customers in the last quarter was $6.20 and that the standard deviation was $1.90.
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