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You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. You sample 30 night students, and the sample mean GPA is 2.34 with a standard deviation of 0.456. You sample 25 day students, and the sample mean GPA is 2.59 with a standard deviation of 0.482. Test the claim using a 10% level of significance. Assume the sample standard deviations are unequal and that GPAs are normally distributed.
Hypotheses:
H0: μ1 = μ2
H1: μ1 ≠ μ2
What is the test statistic for this scenario? Give answer to exactly 4 decimal places.
Describing a process that is in control. A manager who knows no statistics asks you, "What does it mean to say that a process is in control?
Compute z values for each and comment on your findings.
The NBC hit comedy Friends was TiVo s most popular show during the week of April 18 24, 2004. According to the Nielsen ratings, 29.7% of TiVo owners.
A random sample of 12 batteries yields X-bar = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
Suppose you participate in a chess tournament in which you play n games. Since you are a very average player, each game is equally likely to be a win, a loss, or a tie. You collect 2 points for each win, 1 point for each tie, and 0 points for each..
a payoff table is given asstate of naturedecisions1s2s3d11086d214152d3789a. what decision should be made by the
What do you think is more difficult to plan: Capacity in a service company or Capacity in a manufacturing company? Why? 3-4 sentences.
From these values, what conclusions can you make about stability of the process being monitored? Make the appropriate control chart.
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described with a Normal model.
a farmer loses 60000 when the summer is too dry and makes 100000 when the growing season is moderate. the probability
Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05).
Determine the Bayes decision assuming a uniform prior for the states of nature.
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