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A sample of nurses revealed their mean income to be $72,000.00 for 9 months with a standard deviation of $3000.00 What proportion of those nurses earn more than 66,000 and less than 78,000?
The manufacturer would like to establish inventory levels such that there is only a 5 percent chance of running out of stock. Where should the manufacturer set the inventory levels?
The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000. A loan application
A random sample of 20 items is selected from a population. To determine the appropriate critical t-value what number of degrees of freedom should be used?
Question: A normal population has a mean of 12.2 and a standard deviation of 2.5. a) Compute the z-value associated with 14.3
Given that the exam has a mean of 1000 and a standard deviation of 200, what is the lowest possible score a student needs to qualify for acceptance into the JB University?
Question: The mean of a normal probability distribution is 60; the standard deviation is 5. a) What percent of the observations lie between 55 and 65?
Fifty percent of the people that get mail-order catalogs order something. Find the probability that only four of the 10 people getting these catalogs will order something.
A normal population has a mean of 12.2 and a standard deviation of 2.5. a) Compute the z-value associated with 14.3
A repeated-measures analysis of variance with a sample of n = 8 participants, produces df within treatments = 14. What is the value for df error for this analysis?
Each well costs $20,000 to drill; a well which strikes oil will bring in $750,000 in revenue. Find the expected gain from the 20 wells.
What is the purpose of forecasting? Why are forecasts not always correct? What are the limitations of forecasting?
Calculate your statistic and p-value. (This is where you run spss and examine your output files.)
Why is the trend commonly thought to be the most important component of forecasting? How is the linear trend method related to linear regression?
New car design specifications are being considered to control the variation of the head injury measurements. Use the same sample data below to construct a 95% confidence interval estimate of o?
When using a multiple regression model, the first decision (besides what you would like to predict) is the selection of independent variables, or predictor variables.
if a male passenger is randomly selected, find the probability that he can fit through the doorway without bending.
What are some of the issues relevant to forecasting with multiple regression models? Just because a multiple regression model is statistically significant, does that mean it will do a good job for
Developing a multiple regression model requires judgment, skill and often times several iterative steps. Even though automatic model building procedures (e.g., stepwise, best subsets) are helpful,
If the gas mileages are normally distributed with a standard deviation of 0.75 miles per gallon, find the probability that the runabout has a gas mileage of between 29.8 and 30.2 miles per gallon
The personnel officer selects two applicants at random to fill the two jobs. If the two jobs are different, what is the probability that at least one male is selected for the jobs?
What is the probabliltiy that you have no winnin tickets, all of the winning tickets, at least one winning tickets, and at least one nonwinning tickets?
What is the probability that a randomly selected Mutual Funds gave a return of 3 percent to under 15 percent?
A salesperson either makes a sale (S) or does not make a sale (N) with each of two potential customers. What is the probability that exactly one sale is made?
A survey has revealed that 75% of all college students study. A randomly selected student is observed to graduate. What is the probability that the student studied?