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A sample of 2,000 union members was selected and their opinions regarding a proposed management union contract was recorded. 1,600 members were in favor of it. A 95% confidence interval for the population was computed to be .78 and .82. This indicates that about 80 out of 100 similarily constructed intervals would include the population porportion. (true or false)
To find z-score and required probabilities based on Normal distribution. Assume that childrens weekly allowances are normally distributed in the population.
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
At the .01 significance level, is there a difference in the use of the four entrances?
What are the implications of statistical variation? Why are we interested in understanding and measuring variation?
For the data giben below, prepare a R-chart. Note that the sample size is three.
The final grades given by two professors in introduction to operations research course have been carefully examined. The students in the first professor's class had a grade point average of 3.0 and a standard deviation of 0.2.
If wages were increased by $1.00, what is the expected effect on the number of complaints received per employee? How can you tell?
Calculate the mean number and median number of apples in a bag.
A sample of 49 pieces of cloth reveals a sample mean breaking strength of 69.1 pounds. State the null and alternative hypotheses.
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. Suppose that 15 firms were in the market to purchase a high-end Unix machine. Assume that these firms listened to sales pitches by a..
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