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In the population survey of patients in a rehabilitation hospital, the mean lengthof stay in the hospital was 12.0 weeks with the standard deviant of 1.0 week. Out of 100 patients, how many wouldyou expect to stay longer than 13 weeks?
Determining the strength of a correlation is very important to determine how well one variable can predict another. To determine the strength of a correlation, we have to calculate the correlation coefficient, r.
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
Given a situation where a control chart with 3-sigma limits is being constructed to monitor the percentage of defective items produced by a process, if samples of 100 units each are taken from the process and the average percent defective found in..
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion of women over 55 who are widows?
What is the importance of hypothesis testing for independence of variables using two-way tables? Is there an example of this for a better understanding?
Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
Make up a scatter diagram with 10 dots for each of the following situations:
The food distributor selects a sample of stores located in areas where he believes the shoppers are receptive to trying new products. What type of sampling does this represent?
Using hypergeometric distribution, determine the probability that the sample of 6 will comprise 2 nonconforming watches?
How many participants need to be enrolled in each group to achieve 80% power using a two-sided test with significance level =.05
In a certain city, 50 percent of the people consider themselves conservative (C), 25 percent consider themselves liberal (L), and 25 percent consider themselves to be independent (I).
No Gulf View condominium with a list price of $285,000. What is your estimate of the final selling price and number of days required to sell each of these units?
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