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Discuss the reason that sampling distribution of the mean follow a normal distribution for a large enough sample size, even though the population may not be normally distributed? Please discuss in detail. Discuss how a sample size, n, an increase in confidence is achieved by widening the confidence interval. With regard to hypothesis testing about two means, what is the distinction between two independent populations and two related populations? Please be specific in your answer. In a one-way ANOVA, what is the difference between among-group variation and between-group variation? Discuss the assumptions of ANOVA? Please list and elaborate on each answer. Explain the null hypothesis (Ho) for a simple linear regression equation? Please list and explain in detail.
Develop a stem-and-leaf chart. Summarize the number of times each ATM was used. What was the typical, minimum, and maximum number of times each ATM was used?
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
A recent national survey found that high school students watched an average (mean) of 6.8 videos per month. A random sample of 36 college students revealed that the mean number of videos watched last month was 6.2
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
For which of given variables must a "two tail" t-test be applied?
At the .01 level of significance, do these data support the conclusion that the ferritin distribution in elderly men has a smaller variance than in younger men?
Determine the critical path probability that project will be completed within?
All the pupils took the same achievement test, and the means for groups receiving different methods were compared. What was the dependent variable?
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make? Please provide step by step solution.
Suppose in fact that 47% of the population favors this idea. Use the normal distribution to calculate the probability that at least half of the sample are in favor.
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
How could the engineer increase the accuracy of the interval without changing the level of confidence?
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