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I need help with proving that a population mean is not 150. Use an alpha of 5% and set up the full, detailed, five step hypothesis test. Assume when the sample 200 is taken the sample standard deviation is 10 and the sample mean is 151.77.
What is the p value?
Describe the steps in formal hypothesis testing. Make at least one comment for each step.
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
In a market study for Target, a researcher found that 70% of customers are repeat customers. If 14 customers are selected at random, find the probability of getting.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Suppose that a company claims that their mean weekly sales are $12,250. A random sample 35 weeks yields a sample mean of with a sample standard deviation of s=$1250.
Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
1st a confidence interval is constructed without utilizing the finite population correction factor.
Create a hypothesis and write out the eight steps used to apply a statistical test to your hypothesis.
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
That's a much larger sample than standard sample surveys. In spite of this, we can't trust the result to give good information about any clearly defined population. Why?
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