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According to an IRS study, it takes a mean time of 290 minutes for taxpayers to prepare, copy and electronically transfer a 1040 tax form. The standard deviation of this distribution is 75 minutes. A consumer watchdog agency selects a random sample of 45 taxpayers for further study.A. What is the shape, mean(expected value), and standard deviation of the sampling distribution of the sample mean for samples of size 45?B. What is the probability that the sample mean is greater than 310 minutes?C. What is the probability that the sample mean is less than 5 hours?
Why do we care whether the assumptions required for statistical tests are met?
Ha: p>1 minute OrHa: p
What is the Z score of a child eating 20 treats - what is the Z score of a child eating 5 treats and faculty or administrative staff member
Lengths of chromosomes in a certain species are uniformly
Minimize the production cost and the optimal order quantity is cartons of milk, and the average inventory is about cartons - variable cost of making
What does p = .05 mean? What are some misconceptions about the meaning of p = .05? Why are they wrong? Should all research adhere to the p = .05 standard for significance? Why or why not?
Identify the type of observational study (cross-sectional, retrospective, or prospective) described
What is the critical path and project completion time for the budgeting process and what is the cost to complete the project based on the Normal Times?
Find the probability
The vast majority of the world uses
Binomial probability distribution
Descriptive Statistics and Z-scores
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