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What is the most preferred form of recognition in the workplace? In a survey by Office Arrow, 163 of 388 administrative professionals responded that verbal recognition is the most preferred form of recognition, and 74 responded that cash bonuses are most preferred. Answer question 8.33, parts (a) and (b) only.
a. Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer verbal recognition.
b. Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
Assume that the significance level is a= 0.1. Use the given information to find the p-value and the critical value (s). With H1: p = with line through it 1/2 the test statistic is z= - 1.35
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
Which test do we use to see if the difference in our sample is statistically significant? Why? Should it be one or two-tailed?
Explain in detail what the optimum Neyman=Pearson test is for all values of the false alarm probability a in the open interval (0,1).
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
Make up a scatter diagram with 10 dots for each of the following:
Illustrate is the range of values for a coefficient of correlation. Illustrate degree of relationship do values of the correlation coefficient (r)with magnitudes close to 1.00 indicate.
Evaluate a simple aggregate price index for 2004. Use 2000 as the base period - Estimating the simple aggregate price index.
To test the difference between two means using two mean z test.
Comparing the results from (a) and (e), what happens to the required sample size when we increase the confidence level?
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