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An HR manager comes with an issue symptomatic of an underlying problem. He says that levels of employee motivation in his organization are dropping leading to drop in employee productivity. Draft a research proposal to identify the problem and suggest a methodology for recommending a solution.
A sample of 60 smokers has a mean cotinine level of 125. Assuming that sigma=25, find the 90% confidence level estimate of the mean cotinine level of all smokers.
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together?
A counselor is interested in determining if there is a relationship between children's scores on the racial attitude and preference test and their scores on the racial socialization test. She sampled a group of 10 children yielding the following r..
If you have a population that has a small sample, but does not meet all of the criteria for the nonparametric test how can you tell what test to use?
A straight rod is formed by connecting three sections A, B and C, each of which is manufactured on a different machine. The length of section A, in inches has a normal distribution with mean 20 and variance 0.04.
The following data refers to gross earned income, in thousands of dollars per year, and level of taxation on that income.
People arrive at a restaurant at a rate of five per minute and wait to receive their order for an average of 5 mins. Customers eat in with a probability of 0.5 and carry out with a probability of 0.5.
Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.'
Explain finding value of test statistic and P-value also understand the result. At the .01 significance level can we compute that the mean fare has increased.
Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals.
Determine the probability that: a) Exactly 3 will have this mild side effect.
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