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The following are the lengths of stay (in days) for a random sample of patients discharged from a particular hospital:
Draw the histogram for these data using an initial class boundary of and a class width of . Note that you can add or remove classes from the figure. Label each class with its endpoints.
In addition, the gender of the respondent is noted. After analyzing the results the following table of joint probabilities was produced: Find the probability that a customer who rates Windsor as excellent is a man. 0.45
The distribution of box weights is normally distributed with a mean of 9 ounces and a variance of 0.01 ounces. What is the probability of randomly selecting a box containing less than 8.9 ounces?
Determine the margin of error that corresponds to the given values of n (times) and x (successes) and the degree of confidence: n=1400, x=420, 95%. Go 3 decimal places of precision.
Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
What is the most probable number of patients arriving each Saturday and give the main assumptions we make when we model the above situation using a Poisson distribution.
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?
Graph the p.d.f and show that the probability of the part failing in the first 200 weeks is 1/8
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
Eighteen first interviews are usually scheduled per day. What is the probability that the average length of time for the eighteen interviews will be 40 minutes or longer?
The data collected was for each car for each type of fuel. Performance was measured in miles per gallon. Perform an ANOVA test and state the results.
The data presented in the table below resulted from an experiment in which seeds of 5 different types were planted and the number of seeds that germinated within 5 weeks after planting was recorded for each seed type.
Please answer the following: Prove that the square of an even number is even. Make sure to show all steps required.
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