MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Concept explainers

Estimation
A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.
Question
The National Hurricane Center provides data that list the number of large (category 3, 4, or 5) hurricanes each year since 1851. The data are summarized below. Recently, there has been some concern that perhaps the number of large hurricanes has been increasing. The natural null hypothesis would be that the frequency of such hurricanes has remained constant.
 
With the 338 large hurricanes observed over the 17 periods, what are the expected value(s) for each cell? (Round to nearest whole number.) 
What is the value of the degrees of freedom? df = _____ 
What is the chi-square statistic? (To 2 decimal places) 
What is the p-value? (3 decimal places; scientific notation)
What is your decision? 
The National Hurricane Center provides data that list the number of large (category 3, 4, or 5) hurricanes each year since 1851. The data are summarized below. Recently, there has been some concern that perhaps the number of large hurricanes has been increasing. The natural null hypothesis would be that the frequency of such hurricanes has remained constant. DECADE COUNT 1851 - 1860 10 1861 - 1870 5 1871 - 1880 14 1881 - 1890 14 1891 – 1900 17 1901 – 1910 11 1911 - 1920 13 1921 – 1930 17 1931 – 1940 20 1941 – 1950 29 1951 - 1960 33 1961 - 1970 1971 - 1980 27 16 1981 – 1990 16 1991 – 2000 27 2001 – 2010 38 2011 - 2020 31
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Transcribed Image Text:The National Hurricane Center provides data that list the number of large (category 3, 4, or 5) hurricanes each year since 1851. The data are summarized below. Recently, there has been some concern that perhaps the number of large hurricanes has been increasing. The natural null hypothesis would be that the frequency of such hurricanes has remained constant. DECADE COUNT 1851 - 1860 10 1861 - 1870 5 1871 - 1880 14 1881 - 1890 14 1891 – 1900 17 1901 – 1910 11 1911 - 1920 13 1921 – 1930 17 1931 – 1940 20 1941 – 1950 29 1951 - 1960 33 1961 - 1970 1971 - 1980 27 16 1981 – 1990 16 1991 – 2000 27 2001 – 2010 38 2011 - 2020 31
With the 338 large hurricanes observed over the 17 periods, what are the expected value(s) for each cell? (Round to nearest whole number.) What is the value of the degrees of freedom? df = What is the chi-square statistic? (To 2 decimal places) What is the p-value? (To 3 decimal places; enter scientific notation like this: 1.234E-5 just like your calculator output) * What is your decision?
expand button
Transcribed Image Text:With the 338 large hurricanes observed over the 17 periods, what are the expected value(s) for each cell? (Round to nearest whole number.) What is the value of the degrees of freedom? df = What is the chi-square statistic? (To 2 decimal places) What is the p-value? (To 3 decimal places; enter scientific notation like this: 1.234E-5 just like your calculator output) * What is your decision?
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