Please help with b and c as quickly! Thank you Exercise 4A Limit your attention to the most “recent” temperature data, (which we define as years 1990- 2013), for New York City. Answer the following questions: a) For how many years during the recent period, did the annual temperature rise above the historical mean calculated for the entire period? Does this represent a reasonable, relatively large or relatively small percentage of the recent years? b) Of the 25 warmest years in recorded history, what percentage occurs during the recent period? Do you think the recent period has more or less than its fair share of warmer years? (Hint: It may help to re-sort the data according to temperature). c) Is the mean temperature for the recent period higher or lower than that of the entire period? Calculate the z-score for the recent mean based on the mean and standard deviation for the entire period. What does the value of the z-score tell you about the difference between the two means? d) Draw a Box Plot for the recent years and place it next to the Box Plot obtained from the data corresponding to the years prior to 1990. Are there any noteworthy differences between the two? e) Write a paragraph to summarize your findings: are NYC annual temperatures notably different in recent times from what they were in the earlier part of the observation period. In what way? Year NYCtemp 1869 51.4 1870 53.6 1871 51.1 1872 51 1873 51 1874 51.3 1875 49.4 1876 51.9 1877 52.8 1878 53.6 1879 52.3 1880 53.2 1881 52.4 1882 52 1883 50.5 1884 52.4 1885 51.1 1886 51 1887 50.9 1888 49.3 1889 52.7 1890 52.7 1891 53.8 1892 51.9 1893 50.4 1894 52.8 1895 51.3 1896 51.7 1897 51.6 1898 53 1899 52 1900 52.4 1901 50.6 1902 51.2 1903 51.2 1904 48.7 1905 51.2 1906 52.7 1907 50.4 1908 52.5 1909 51.4 1910 51 1911 52.2 1912 51.7 1913 53.9 1914 51.1 1915 52.5 1916 51.1 1917 49.7 1918 52.1 1919 52.8 1920 51.7 1921 54.4 1922 52.8 1923 52 1924 51.1 1925 52.7 1926 50.2 1927 52.6 1928 52.7 1929 53.2 1930 53.7 1931 55.1 1932 54.3 1933 53.5 1934 52 1935 52.3 1936 52.6 1937 53.5 1938 54 1939 53.5 1940 50.7 1941 53.6 1942 52.8 1943 52.6 1944 53.4 1945 53 1946 54.2 1947 52.8 1948 53 1949 55.9 1950 52.6 1951 54 1952 54.8 1953 56 1954 53.9 1955 53.9 1956 52.7 1957 54.7 1958 51.8 1959 54.6 1960 53.1 1961 53.9 1962 52.4 1963 52.5 1964 53.5 1965 53.1 1966 53.9 1967 51.9 1968 53 1969 53.7 1970 53.2 1971 54.1 1972 53 1973 55.3 1974 54.2 1975 54.4 1976 52.8 1977 53.4 1978 52 1979 54.1 1980 53.6 1981 53.9 1982 53.5 1983 54.7 1984 54.1 1985 54.2 1986 54.2 1987 54.3 1988 54 1989 53.2 1990 56.4 1991 56.4 1992 53.1 1993 54.7 1994 54.4 1995 54.4 1996 53.7 1997 54.3 1998 57.1 1999 56.5 2000 53.8 2001 56.2 2002 56.4 2003 53.4 2004 54.5 2005 55.7 2006 56.8 2007 55 2008 55.3 2009 54 2010 56.7 2011 56.4 2012 57.3 2013 55.5

Please help with b and c as quickly! Thank you Exercise 4A Limit your attention to the most “recent” temperature data, (which we define as years 1990- 2013), for New York City. Answer the following questions: a) For how many years during the recent period, did the annual temperature rise above the historical mean calculated for the entire period? Does this represent a reasonable, relatively large or relatively small percentage of the recent years? b) Of the 25 warmest years in recorded history, what percentage occurs during the recent period? Do you think the recent period has more or less than its fair share of warmer years? (Hint: It may help to re-sort the data according to temperature). c) Is the mean temperature for the recent period higher or lower than that of the entire period? Calculate the z-score for the recent mean based on the mean and standard deviation for the entire period. What does the value of the z-score tell you about the difference between the two means? d) Draw a Box Plot for the recent years and place it next to the Box Plot obtained from the data corresponding to the years prior to 1990. Are there any noteworthy differences between the two? e) Write a paragraph to summarize your findings: are NYC annual temperatures notably different in recent times from what they were in the earlier part of the observation period. In what way? Year NYCtemp 1869 51.4 1870 53.6 1871 51.1 1872 51 1873 51 1874 51.3 1875 49.4 1876 51.9 1877 52.8 1878 53.6 1879 52.3 1880 53.2 1881 52.4 1882 52 1883 50.5 1884 52.4 1885 51.1 1886 51 1887 50.9 1888 49.3 1889 52.7 1890 52.7 1891 53.8 1892 51.9 1893 50.4 1894 52.8 1895 51.3 1896 51.7 1897 51.6 1898 53 1899 52 1900 52.4 1901 50.6 1902 51.2 1903 51.2 1904 48.7 1905 51.2 1906 52.7 1907 50.4 1908 52.5 1909 51.4 1910 51 1911 52.2 1912 51.7 1913 53.9 1914 51.1 1915 52.5 1916 51.1 1917 49.7 1918 52.1 1919 52.8 1920 51.7 1921 54.4 1922 52.8 1923 52 1924 51.1 1925 52.7 1926 50.2 1927 52.6 1928 52.7 1929 53.2 1930 53.7 1931 55.1 1932 54.3 1933 53.5 1934 52 1935 52.3 1936 52.6 1937 53.5 1938 54 1939 53.5 1940 50.7 1941 53.6 1942 52.8 1943 52.6 1944 53.4 1945 53 1946 54.2 1947 52.8 1948 53 1949 55.9 1950 52.6 1951 54 1952 54.8 1953 56 1954 53.9 1955 53.9 1956 52.7 1957 54.7 1958 51.8 1959 54.6 1960 53.1 1961 53.9 1962 52.4 1963 52.5 1964 53.5 1965 53.1 1966 53.9 1967 51.9 1968 53 1969 53.7 1970 53.2 1971 54.1 1972 53 1973 55.3 1974 54.2 1975 54.4 1976 52.8 1977 53.4 1978 52 1979 54.1 1980 53.6 1981 53.9 1982 53.5 1983 54.7 1984 54.1 1985 54.2 1986 54.2 1987 54.3 1988 54 1989 53.2 1990 56.4 1991 56.4 1992 53.1 1993 54.7 1994 54.4 1995 54.4 1996 53.7 1997 54.3 1998 57.1 1999 56.5 2000 53.8 2001 56.2 2002 56.4 2003 53.4 2004 54.5 2005 55.7 2006 56.8 2007 55 2008 55.3 2009 54 2010 56.7 2011 56.4 2012 57.3 2013 55.5

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.16PAE: 9.16 According to Figure 9.2, the total energy supply in the United States in 2016 was 111.261015...

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Please help with b and c as quickly! Thank you

Exercise 4A
Limit your attention to the most “recent” temperature data, (which we define as years 1990-
2013), for New York City. Answer the following questions:
a) For how many years during the recent period, did the annual temperature rise above the
historical mean calculated for the entire period? Does this represent a reasonable, relatively
large or relatively small percentage of the recent years?
b) Of the 25 warmest years in recorded history, what percentage occurs during the recent
period? Do you think the recent period has more or less than its fair share of warmer years?
(Hint: It may help to re-sort the data according to temperature).
c) Is the mean temperature for the recent period higher or lower than that of the entire period?
Calculate the z-score for the recent mean based on the mean and standard deviation for the
entire period. What does the value of the z-score tell you about the difference between the
two means?
d) Draw a Box Plot for the recent years and place it next to the Box Plot obtained from the data
corresponding to the years prior to 1990. Are there any noteworthy differences between the
two?
e) Write a paragraph to summarize your findings: are NYC annual temperatures notably
different in recent times from what they were in the earlier part of the observation period. In
what way?

Year	NYCtemp
1869	51.4
1870	53.6
1871	51.1
1872	51
1873	51
1874	51.3
1875	49.4
1876	51.9
1877	52.8
1878	53.6
1879	52.3
1880	53.2
1881	52.4
1882	52
1883	50.5
1884	52.4
1885	51.1
1886	51
1887	50.9
1888	49.3
1889	52.7
1890	52.7
1891	53.8
1892	51.9
1893	50.4
1894	52.8
1895	51.3
1896	51.7
1897	51.6
1898	53
1899	52
1900	52.4
1901	50.6
1902	51.2
1903	51.2
1904	48.7
1905	51.2
1906	52.7
1907	50.4
1908	52.5
1909	51.4
1910	51
1911	52.2
1912	51.7
1913	53.9
1914	51.1
1915	52.5
1916	51.1
1917	49.7
1918	52.1
1919	52.8
1920	51.7
1921	54.4
1922	52.8
1923	52
1924	51.1
1925	52.7
1926	50.2
1927	52.6
1928	52.7
1929	53.2
1930	53.7
1931	55.1
1932	54.3
1933	53.5
1934	52
1935	52.3
1936	52.6
1937	53.5
1938	54
1939	53.5
1940	50.7
1941	53.6
1942	52.8
1943	52.6
1944	53.4
1945	53
1946	54.2
1947	52.8
1948	53
1949	55.9
1950	52.6
1951	54
1952	54.8
1953	56
1954	53.9
1955	53.9
1956	52.7
1957	54.7
1958	51.8
1959	54.6
1960	53.1
1961	53.9
1962	52.4
1963	52.5
1964	53.5
1965	53.1
1966	53.9
1967	51.9
1968	53
1969	53.7
1970	53.2
1971	54.1
1972	53
1973	55.3
1974	54.2
1975	54.4
1976	52.8
1977	53.4
1978	52
1979	54.1
1980	53.6
1981	53.9
1982	53.5
1983	54.7
1984	54.1
1985	54.2
1986	54.2
1987	54.3
1988	54
1989	53.2
1990	56.4
1991	56.4
1992	53.1
1993	54.7
1994	54.4
1995	54.4
1996	53.7
1997	54.3
1998	57.1
1999	56.5
2000	53.8
2001	56.2
2002	56.4
2003	53.4
2004	54.5
2005	55.7
2006	56.8
2007	55
2008	55.3
2009	54
2010	56.7
2011	56.4
2012	57.3
2013	55.5

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