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Precision Parts is a job shop that specializes in producing electric motor shafts. The average shaft size for the E300 electric motor is .55 inch, with a standard deviation of .10 inch. It is normally distributed. What is the probability that a shaft selected at random will be between .55 and .65 inch?
The linear correlation coefficient, r, measures the strength of the linear relationship the variables in a set of ordered pairs (x,y). What is the maximum and minimum values for r?
Describe a real-life situation where Pascal's Triangle can be used to calculate probability. Is this the best method for solving your calculation?
Find a 96% confidence interval for the true percentage of all households that have central air conditioning. Write a sentence that interprets this interval.
When someone buys a ticket for an airline flight, there is a 90% probability that a person will not show up for the flight. Air America books 15 people on a commuter flight that can only seat 13 passengers.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
Develop a linear trend equation for the time series. Graph the time series and the linear trend equation. What appears to be happening to capital expenditures? What is the forecast one year, or four quarters, into the future?
Average Precipitation For the first 7 months of the year, the average precipitation in Toledo, Ohio, is 19.32 inches. If the average precipitation is normally distributed with a standard deviation of 2.44 inches, find these probabilities.
Suppose a firm evaluates the productivity of the three shifts of workers who work in their factory. Each shift's performance is measured based on the amount of output that is produced during the shift - day, evening, or swing shift.
How does a linear regression allow us to better estimate trends, costs, and other factors in complex situations?
Heights are sampled of kids from three schools. Using a 0.05 significance level, if when looking at ANOVA results, your p-value is 0.04, what can you say about your sample data? no minimum word count.
It has been said that from the point of view of the general population, Type I errors are particularly undesirable. This has been used as a justification for setting alpha at such low levels as .05 and .01.
What is the interpretation of the coefficients that emerge from the regression equation. Can you predict a change in the y variable given knowledge of the x variable?
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