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While the national unemployment rate may have ticked up slightly in 2010, in states such as California, Nevada, and Michigan the employment picture continues to look grim (CNNMoney, September 21, 2010). Consider the following table, which lists a portion of the monthly unemployment rates (seasonally adjusted) in California from 2007-2010. The full data set can be found on the text website, labeled California Unemployment.
Year
Month
Unemployment Rate (%)
2007
Jan
4.9
Feb
5.0
....
2010
Dec
a. Plot the above series. Which polynomial trend model do you think is most appropriate?
b. Verify your answer by formally comparing the linear, the quadratic, and the cubic trend models.
c. Forecast the unemployment rate in California for January 2011.
Educated mothers. The National Center for Education Statistics monitors many aspects of elementary and secondary education nationwide.
let the cumulative distribution function of the random variable y be given byfy 0 ylt0y3-2sqrt y 0ltylt11 ygt1.a. find
Calculate the conservative margin of error, as a proportion and as a percentage, for each of the following possible sample sizes:
What assumptions are you making to calculate these estimates? What do these assumptions mean in terms of fisher behavior and "catchahility"?
as a counselor in the field of addiction you are interested in researching if online gambling is becoming more
Assuming normal populations with equal standard deviations, use the 0.01 level in examining whether pulling the trailer uses significantly less fuel than driving with the rooftop carrier.
A human society claims that less than 36% of US. households own a dog. In random sample of 397 U. S. households, 151 say they own a dog. At mean=0.03, is there enough evidence to support the society's claim?
a random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.29
Without making any further assumptions about the distribution of the scores, find an upper bound on the number of scores exceeding 130.
A first year medical school class (n = 200) took a first midterm examination in human physiology. The results were as follows (_X = 65, S = 7). Explain how you would standardize any particular score from this distribution, and then solve the follo..
Determine whether there are differences in the means of the number of cereal leaf beetles, in terms of colour preference, based on the numbers trapped on the different coloured boards.
There are three cards in a box. Both sides of one card are black, both sides of one card are red, and the third card has one black side and one red side.
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