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Question: 1. What are the five steps of a test of hypothesis using the critical value approach? Explain briefly.
2. What does the level of significance represent in a test of hypothesis? Explain.
3. By rejecting the null hypothesis in a test of hypothesis example, are you stating that the alternative hypothesis is true?
The data studies the effect of dietary calcium on blood pressure. In the experiment, one group of black male adults received calcium supplements for 12 weeks.
Suppose a random sample of size 64 is drawn from a population with a mean of 277. If 90% of the time the sample mean is less than 280, what is the population standard deviation?
an electrical distribution system consists of 3 subsystems in parallel with the following individual subsystem
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
Specify what an individual unit is in each of the following studies. Then specify what two variables were measured on each unit.
Over many years of administering tests to my statistics students I have found that the overall average of the scores on the first exam that I give each semester is 76.
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12 point treatment effect and plans to use a ..
Hospitials having fewer that 1000 discharges is estimated from a simple random sample of size 25. Use the central limit theorem to sketch the approximate sampling distribution of the estimate.
Pharmacies continually monitor their prescription filling process. A local pharmacy has noted that the time to fill a prescription for a generic antibiotic is normally distributed, with a mean of 13.3 minutes and a standard deviation of 2.8 minute..
At the end of each month TetraCon, Inc. incurs an inventory cost of $50 per bike.
I conduct an experiment doing fixed-level testing with ε = .05; I know that for a given set of alternatives my power will be .85. True or False ?
What is the probability that a single service call takes between 50 and 70 minutes? The probability is 0.025 that a single service call takes more than how many minutes?
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