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1. Consider the following questions concerning the sample variance:
a. Is it possible for a variance to be negative? Explain.
b. What is the smallest value a variance can be? Under what conditions does the variance equal this smallest value?
c. Under what conditions is the sample variance smaller than the corresponding sample standard deviation?
2. For a continuous variable that has a bell-shaped distribution, determine the percentiles associated with the endpoints of the intervals specified in the Empirical Rule.
3. Consider that the Empirical Rule stipulates that virtually all of the data values are within the interval m 3s. Use this stipulation to determine an approximation for the standard deviation involving the range.
if you draw 7 cards at random from a standard deck of 52 cards what is the probability that you will get exactly two
A Poisson distribution was fitted to data for the number of cars crossing a bridge in forty successive 6-minute intervals of time. The sample mean was calculated from the data to be ??¯ = 2.875 and this value was used as an estimate of the populat..
two hundred single sport athletes were cross-classified according to gender as
Your quality control department has just analyzed the contents of 20 randomly selected barrels of materials to be used in manufacturing plastic garden equipment.
What basis of accounting is used to report governmental activities in government-wide financial statements? Can another basis be used? Please explain.
in the design of an electromechanical product 12 components are to be stacked into a cylindrical casing in a manner
Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval and what is the probability that for the second sample, the mean commute distance will be less than 29.6 miles?
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If 3 or fewer are defective, the lot is accepted. Based upon their sampling plan, what is the probability that a lot of 10 percent defective will be accepted?
Construct a stem-and leaf display for the data set? Construct a box plot for the data set? Draw conclusions about the data (e.g. are there any outliers, etc, etc.).
This problem relates to Basic Statistics and it is about calculate the mean, median and mode for the given data
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