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The times it takes workers to complete a task at a certain assembly plant are normally distributed with mean = 10 minutes and standard deviation = 2 minutes. What is the probability that in a random sample of 8 workers, more than 6 will complete the task in less than 10 minutes? Round your answer to 4 decimal places.
Find the most powerful predictor among the six independent variables using regression.
According to the data from the College Entrance Examination Board, scores on the SAT-I test have a mean of 1017, and Q1 is 880.
Assume that correlation coefficient between 2 variables is nearly zero. What does this say about relationship between them?
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
Is there evidence that the change was successful in reducing the wait time? (use 0.05 level of significance)
Girl B throws 15 times, with a prob. of success = 0.2. And girl C throws 20 times, with a probability of success equal to 0.1. Determine the probability that the target will get hit at least 12 times.
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
At the .05 significance level, can we conclude that the guideline is still reasonable?
Analyst computes production cost per unit in each order and averages these to get $50.
Suppose the population is normally distributed they make a decision to do a hypothesis test.
Identify three discrete variables that appear in your current or future career. How do those variables affect your workplace, your product, or your personnel? How would changes in those variables affect these things?
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