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RA,CD's, Inc., wants the mean lenghts of the "cuts" on a CD to be 135 seconds (e minutes and 15 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10 minute segment. Assume the distribution of the length of the cuts follows the normal distribution witha population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CD's sold by CRA CD's Inc.?
a) what can we say about the shape of the distribution of the sample mean?b) what is the standard error of the mean?c) what percent of the sample means will be greater thatn 140 seconds?d) what percent of the sample means will be greater than 128 seconds?e) what percent of the sample means will be greater than 128 but less than 140 seconds?
Finding the probability of each event in a group of events of different possibility
Find out point estimate and 95% confidence interval for mean family dental expenses of all employees of company.
At α = 0.10 test the claim that there is a difference in means of the salaries. (a) State the Hypotheses: (b) Compute the Test statistic: (Round off correctly)
The Money & Investing section of The Wall Street Journal contains a summary of daily investment performance for stock exchanges, overseas markets, options, commodities, futures, and so on.
Suggest applications of nonparametric methods to solving business related problems. Describe the example. How are you or could you use nonparametric methods to solve business related problems?
Which represent errors of estimation for individual points, an alternative way to examine the error of the regression model using a single measurement is to determine the sum of all the residuals.
A researcher has a series of Likert-scale items and a measure of frequency of absenteeism. He uses each of the Likert-scaled items in a separate bivariate correlation with absenteeism without testing for the assumptions of linear relationships. Is th..
Find the product of the vector of state probabilities for the preceding period and the matrix of transition probabilities.
There are three nursing positions to be filled at Lilly Hospital. Position one is the day nursing supervisor; position two is the night nursing supervisor; and position three is the nursing coordinator position.
Based on these data, does it seem that strength of relationship between sales and promotions expenditures is enough to permit using linear regression forecasting model? Describe why?
A statistics professor planed her classes so carefully that the lengths of her classes are uniformly distributed between 45 and 55 minutes. Find the probability that a given class period runs greater than 50.25 minutes.
If a person were to be hit by lightning, they have a 33 percent chance of being killed. Find the odds that a person will be killed if struck by lightning.
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