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A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee. In order to find out if there is a difference between the reactions of the office personneland the plant personnel regarding the proposal, 120 office personnel and 160 plant personnel were selected at random. Seventy-eight of the office personnel and 90 of the plant personnel were in favor of the proposal. Computed z=1.48. At the 0.01 level, it was concluded that there is sufficient evidence to support the belief that the proportion of office personnel in favor of the proposal is greater than that of the palnt personnel
Suppose a reading between 30 and 40 is called very interesting from an archaeological point of view. Let us say you take readings at n=12 sites chosen at random.
Doctors nationally believe that 68% of a certain type of operation are successful. In a particular hospital 47 of these operations were observed and 37 of them were successful. At a = 0.05 is this hospital's success rate different from the nationa..
Recognize the midpoint of the first class. Recognize the class boundaries of the first class.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
Testing for population mean - What happens as you use different levels of significance? Different values of the standard deviation?
The airline must sell 150 seats to break even on this particular flight. On what percent of the flights does the airline make money?
Advertising coefficient is 200 and t stat is 1.75. Which of the following statements is an accurate interpretation of the situation when using an alpha of .10
What assumption tests should be used? A fifth grade science teacher want to know if there is a relationship between final exam scores and overall course points after adjusting for a quiz score.
What kind of probability uses sample spaces to find out numerical probability that event will happen?
Provide two examples for each source of measurement error and include how each example might likely influence research results.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.
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