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Refer to the Buena School District bus data.
a. Refer to the maintenance cost variable. Develop a box plot. What are the first and third quartiles? Are there any outliers?
b. Determine the median maintenance cost. Based on the median, develop a contingency table with bus manufacturer as one variable and whether the maintenance cost was above or below the median as the other variable. What are your conclusions?
The length of a rectangular swimming pool is 2x - 1 meters, and the width is x + 2 meters. Write a polynomial that represents the area. Find the area if x is 5 meters.
consider a regression model where y is explained by two regressors x1 and x2 i.e. a regression of the form yi x1ibeta1
The mean life of a battery used in a digital clock is 305 days. The lives of the battery follow normal distribution. The battery was recently modified to last longer. A sample of 20 of the modified batteries had a mean life of 311 days with a stan..
1. Suppose you are given a particular set of data and found that r = 2.5. How would you interpret this result?
She surveys 100 randomly selected families and finds the mean income to be $96,321 with a standard deviation of $9555.With a0.05, is she correct?
The number using each entrance is reported below. At the .01 significance level, is there a difference in the use of the four entrances?
The ACT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are normally distributed. In a recent year, the mean test score was 21.1 and the standard deviation was 5.0.
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
multivariable methods can account for variables that are not known during the course of the study?a. trueb.
What percentage of the U.S. population in 2011 did not have health insurance and was between the ages of 18 to 24 years
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.
suppose the akron chamber of commerce has decided to conduct a survey to estimate the proportion of adults between the
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