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Graduates from a graphic arts course at a community college have a mean starting salary of $42,000 with a standard deviation of $1,500. From a sample of 64 graduates, what is the probability that the mean starting salary is between $41,000 and $42,500?
Obtain a test statistic and p -value. Interpret the results at α = .01.
The dealership would now like some general information based on the entire sample of vehicles. Calculate and explain the following:
Suppose that you draw a random sample of 27 cans. Find the probability that the mean weight of the sample is less than 6.19 ounces.
You construct a 90% confidence interval for the average stock price to be (267.348, 279.472). Of the following choices, what is the approporiate interpretation of this interval?
To compile the record chart it is necessary to know the correct average weekly sale to within 1% of its true value. How large a sample size is required?
After polling every 8 th graduate, a major university estimated annual salary of its alumni to be $103,000. What sampling technique was used?
Was your test one-tail upper tail, lower tail, or two-tail? Explain why you chose that kind of test in this situation. Explain what your P-value means in this context.
As it is a 2 × 2 table, try also two-tailed two-sample z test for π 1 = π 2 and verify that z 2 is same as your chi-square statistic. Which test do you prefer? Explain why?
Which measure of family wealth is most important, when making political decisions, the national mean, median or mode?
Part 1: Define and explain historical research. Explain a situation in which historical research would be appropriate. Part 2: Explain the difference between external and internal evidence and give examples of each.
An element E has a constant failure rate λ and a reliability at time t of R(t)=p, if p=0.5 and 0.9, what is the effect on Rs(t), basic reliability, serial Mean Time Between Failure, hs(t), MTBFs if additional elements are added to the baseline sys..
A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6. Find the 95% confidence interval of the mean score for all bowlers.
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