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The amount of time spent by soccer players playing basketball per week is normally distributed with a mean of 4 hours and standard deviation of 1.25 hours. What is the probability that a randomly selected bond trader plays basketball for more than 5 hours?
A sample of 26 automobiles 2 yrs. old showed a standard deviation of $170. What is the test statistic for testing the difference between these population variances at alpha =.01?
How optimal or non-optimal is today's level of economic inequality in the USA? This is the subject for a couple of writing assignments. Are we too equal? Too unequal? About right?
What are the strengths and weaknesses of nonparametric tests? Can the outcomes of the nonparametric tests be generalized to populations?
The grades have a bell-shaped distribution. Based on this information, which one of the following is the best estimate of the number of students with grades between 55 and 83?
You have the option of spending $100 on a marketing campaign, which will definitely bring in all the donors you need (but you don't want to spend this money if you don't need it). Draw a decision tree describing the situation you're facing, calcula..
Is there any evidence to suggest that the mean pressure required to open each valve is different? Use a = 0.05.
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use the p-value method for testing hypotheses.
a certain brand of refrigerator has a lenght of life that is normally distributed with a mean and a standard deviation
Assume the single pineapple is selected at random from last year's crop. Determine the probability that it weighs more than 35 ounces?
Carefully sketch a tree diagram to illustrate the possible outcomes for this experiment.- Find the sample space for this experiment.
Describe the relationship you expect to find between each variable and any interactions among the variables. You may wish to include a rationale for your hypothesis.
the length of an injection-molded plastic case that holds magnetic tape is normally distributed with a length of 90.2
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