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Draw a histogram of DP05. Does DP05 have an approximately normal distribution? Does it have an obvious skew (left or right) and any obvious outliers? If an analysis requires that DP05 have a normal distribution, do you think that your results will be valid?
Now consider the variable EMXP (extreme maximum precipitation). That is the extreme precipitation in each month, in tenths of a millimeter. For example, a value of 300 in EMXP means that it rained 30 millimeters on the rainiest day of that month.
Draw a histogram of EMXP. Does EMXP have an approximately normal distribution? Does it have an obvious skew (left or right) and any obvious outliers? If an analysis requires that EMXP have a normal distribution, do you think that your results will be valid?
A local bakery uses its stock of sugar according to demand for its products. Indeed, the weekly sugar use follows approximately a normal distribution with mean 2,400 lb. and with standard deviation 400lb.
A probability distribution is a mutually exclusive listing of the outcomes of an experiment which can occur by chance and the corresponding probabilities of occurrence.
The length of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. How many days do 80 percent of women last until in their birthing process?
An annuity provides for continuous payments at the rate of t at time t, provided that failure has not yet occurred. Find the expectation and variance of the present value of the benefits.
List an advantage and a disadvantage of a survey conducted in this manner. What sampling technique is used in such a survey?
for a certain type of electronic component the lifetime x in thousands of hours has an exponential distribution with
What is the probability that at least one of five randomly selected 40-year-old females will not live to be 41 years old? Would it be unusual if at least one of five randomly selected 40-year-old females did not live to be 41 years old?
the life expectancy of a common brand of battery is normally distributed with a mean of 400 hours and a standard
The probability of drawing a 6 (to complete an inside straight) after discarding the ace.
sample of 250 people resulted in a confidence interval estimate for the proportion of people who believe that the federal government's proposed tax increase is justified is between 0.14 and 0.20. Based on this information, what was the confidence ..
Determine the least square trend equation. Estimate the number of employees in 2008. By how much the number of employees decreases (or increases) per year on the average?
Construct a scatter plot of the raw data. Then, run the correlation/regression program.
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