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Question 1: The mean starting salary for college Stats Major graduates in spring of 2011 was $65,000. Assuming a normal distribution with a S. D. of $4,000. What percent of the population have starting salaries:
• Between $59,000 and $70,000?• More than $70,000?• Less than $60,000?
a study of 200 computer service firms revealed these incomes after taxesincome after taxesnumber of firmsunder 1
What is the probability that a sample mean will be within plus-or-minus two of the population mean for each of the following sample sizes?
If random samples, each with n = 9 scores, are selected from a normal population with µ = 80 and σ = 36, then what is the expected value for the distribution of sample means?
The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years.
if one of the pedestrians death is randomly selected what is the probability that it involves an intoxicated pedestrian and an intoxicated driver?
How many of the 15 students would you expect to correctly identify Coke or Pepsi? What is the probability that exactly 10 students surveyed will correctly identify coke or Pepsi.
Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
If we assume this is true, what is the probability that in a random sample of 700 undergraduate business students, 181 or more will major in accounting?
What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term one-way mean with respect to an ANOVA?
Determine a 95% confidence interval for the mean efficiency of a given batch of motors. If we want to cut the confidence interval by 1/3, how many motors should be tested?
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Community college spends each year. If she wishes to be 90% confident, how large a sample is necessary if the standard deviation is known to be $80?
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