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Consider a small population of N = 5 units, labeled 1, 2, 3, 4, 5, with respective y-values 3, 1, 0, 1, 5. Consider a simple random sampling design with a sample size n = 3. For your convenience, several parts of the following may be combined into a single table. (a) Give the values of the population parameters μ, τ , and σ2. List every possible sample of size n = 3. For each sample, what is the probability that it is the one selected? (b) For each sample, compute the sample mean y and the sample median m. Demonstrate that the sample mean is unbiased for the population mean and determine whether the sample median is unbiased for the population median.
The mean hourly wage of bottling plant employees in Nelson County is $16.50 per hour. What is the likelihood that we could select a sample of 40 bottlers with a mean of $16.75 or more? The standard deviation of the sample is $1.75
Service times are exponentially distributed and average 24 per hour. Customers that arrive when all seats are taken do not enter the diner. The probability that there are no customers in the diner is?
A school only accepts students with the top 20% of sat scores. The sat has a mean of 500 and a standard deviation of 100. what actual score should be used as the cut-off score?
if a hypothesis test using a sample of n16 scores produces a t statistic of t2.15 then the correct decision is to
What are the three criticisms of null hypothesis statistical testing?
lester hollar is vice president for human resources for a large manufacturing company. in recent years he has noticed
Construct X-bar and R charts based on the data of the first 25 hours. Comment on whether the process is in control
Assume that the two tests use different scales to measure the same aptitude. If someone gets a SAT score that is the 67th percentile, find the actual score and the equivalent ACT score.
Salary data for a sample of 50 universities were obtained. We are curious about the relationship between mean salaries for assistant professors.
a health care facility is interested in monitoring the primary c-section rate. monthly data on the number of c sections
testing the difference between two means. note please respond to one 1 of the following two 2 bulleted itemswhat two
Every laptop returned to a repair center is classified according its needed repairs: (1) LCD screen, (2) motherboard, (3) keyboard, or (4) other. A random broken laptop needs a type i repair with probability pi = 24-i /15. Let Ni equal the number ..
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