1. What would happen to the width of the confidence intervalif the sample size decreases?Explain. -The width of the confidence interval also increases.UsetheJ-Ville-Houseexcelfiletoanswerthefollowingquestions.
   1. Construct a 90% confidence intervalaround the population mean sqft variable. Report the margin of error and the upper andlowerbounds.
   2. Interpret the confidence intervalin the context of thequestion.

sale	Sqft	Year	Age	Ward
32500	1000	1920	99	ward1
10000	1719	1916	103	ward1
37000	1132	1920	99	ward1
44500	1252	1920	99	ward1
70000	1009	1895	124	ward1
70000	1003	1920	99	ward1
38357	1134	1930	89	ward1
36500	966	1920	99	ward1
3000	1078	1915	104	ward1
16500	1200	1966	53	ward1
25000	864	1955	64	ward1
69000	768	1930	89	ward1
45000	768	1930	89	ward1
24000	892	1944	75	ward1
5000	896	1940	79	ward1
34000	988	1930	89	ward1
18025	1240	1920	99	ward1
24380	1240	1920	99	ward1
12000	988	1969	50	ward1
32500	1024	1920	99	ward1
52000	1680	2006	13	ward1
66700	1200	1925	94	ward1
58000	918	1950	69	ward1
67500	832	1958	61	ward1
80959	832	1958	61	ward1
64000	768	1945	74	ward1
47000	1008	1995	24	ward1
58000	1008	1995	24	ward1
64000	1284	1935	84	ward1
28500	1284	1935	84	ward1
35000	862	1920	99	ward1
51500	862	1920	99	ward1
63500	1039	1930	89	ward1
62000	1039	1930	89	ward1
58000	826	1930	89	ward1
90000	1568	1996	23	ward1
77000	1449	1945	74	ward4
77500	1104	1950	69	ward4
87000	1104	1950	69	ward4
48000	1125	1915	104	ward1
47000	1336	1963	56	ward1
80000	1336	1963	56	ward1
46300	1308	1956	63	ward1
46300	1308	1956	63	ward1
60000	907	1957	62	ward4
64000	1064	1959	60	ward4
52000	1064	1959	60	ward4
80000	894	1955	64	ward4
51997	925	1955	64	ward4
67900	864	1940	79	ward4
85500	1248	1957	62	ward4
75000	1332	1965	54	ward4
78000	1322	1965	54	ward4
75200	994	1977	42	ward4
63500	1008	1940	79	ward4
65000	1134	1940	79	ward4
73096	1134	1940	79	ward4
41700	1134	1940	79	ward4
82375	1228	1946	73	ward4
40000	792	1956	63	ward4
80000	1196	1993	26	ward4
32000	950	1926	93	ward4
74900	900	1950	69	ward4
71000	1078	1925	94	ward4
75000	1078	1915	104	ward4
65000	980	1962	57	ward4
127500	1000	1920	99	ward4
92500	1270	1900	119	ward4
135000	1497	1900	119	ward4
134000	1497	1915	104	ward4
75000	1396	1920	99	ward4
70000	1396	1920	99	ward4
69900	1253	1956	63	ward4
90000	1360	1965	54	ward4
42000	926	1948	71	ward4
72000	1695	1935	84	ward4
54000	796	1952	67	ward4
45000	763	1920	99	ward4
56750	1176	1962	57	ward4
69500	1176	1962	57	ward4
86000	1176	1965	54	ward4
57000	1332	1920	99	ward4
6500	1075	1925	94	ward4
40000	976	1930	89	ward4
35000	1506	1900	119	ward4
67500	1060	1926	93	ward4
36000	1191	1900	119	ward4
39900	1719	1915	104	ward4
92000	1710	1915	104	ward4
63000	974	1962	57	ward4
89900	990	1955	64	ward4
69900	936	1964	55	ward4
39250	1170	1950	69	ward4
19942	974	1920	99	ward4
48500	896	1965	54	ward4
66500	896	1965	54	ward4
46800	780	1940	79	ward4
56564	780	1947	72	ward4
48000	780	1947	72	ward4
62000	780	1947	72	ward4
54000	952	1936	83	ward4
55500	952	1935	84	ward4
59000	1050	1957	62	ward4
49000	752	1955	64	ward4
44000	752	1955	64	ward4
73000	1041	1956	63	ward4
75000	1032	1956	63	ward4
20000	938	1900	119	ward1
110000	868	1930	89	ward3
110000	868	1930	89	ward3
112500	1436	1940	79	ward3
128500	840	1940	79	ward3
125500	840	1940	79	ward3
145000	840	1940	79	ward3
112000	1032	1935	84	ward3
85000	1221	1941	78	ward3
47125	1325	1940	79	ward3
75000	976	1942	77	ward3
120000	1088	1953	66	ward3
130000	1088	1953	66	ward3
114500	1188	1960	59	ward3
125000	1188	1960	59	ward3
67500	947	1920	99	ward3
78000	1052	1950	69	ward3
73000	1052	1950	69	ward3
70500	938	1941	78	ward3
109000	899	1925	94	ward3
94000	899	1925	94	ward3
86000	1260	1967	52	ward3
92000	1260	1967	52	ward3
78500	1140	1948	71	ward3
86000	1140	1948	71	ward3
84900	960	1947	72	ward3
72000	876	1949	70	ward3
80000	1155	1947	72	ward3
91500	1155	1947	72	ward3
60500	1384	1935	84	ward2
36000	1016	1925	94	ward2
57000	1016	1925	94	ward2
72000	1016	1925	94	ward2
57000	1058	1925	94	ward2
37000	1283	1928	91	ward2
42900	1353	1920	99	ward2
58000	1353	1920	99	ward2
67000	1353	1950	69	ward2
61000	990	1925	94	ward2
56500	1172	1935	84	ward2
61000	1216	1952	67	ward2
50750	1216	1952	67	ward2
83000	1139	1915	104	ward2
106634	1139	1915	104	ward2
28000	1139	1915	104	ward2
25000	1581	1910	109	ward2
72000	929	1910	109	ward2
82000	929	1950	69	ward2
40500	1456	1900	119	ward2
69000	1052	1935	84	ward2
32000	1084	1920	99	ward2
48500	1084	1925	94	ward2
54000	1084	1925	94	ward2
58000	2279	1900	119	ward2
52000	992	1924	95	ward2
75000	872	1940	79	ward2
44750	928	1920	99	ward2
38400	1172	1900	119	ward2
39000	837	1900	119	ward2
62000	1003	1900	119	ward2
10000	1050	1925	94	ward2
42000	955	1920	99	ward2
58500	1080	1936	83	ward2
13000	882	1900	119	ward2
40000	784	1925	94	ward2
32000	1046	1920	99	ward2
47000	955	1900	119	ward2
42800	1064	1930	89	ward2
43000	792	1925	94	ward2
79900	1547	1935	84	ward2
72000	1259	1971	48	ward2
70000	1556	1954	65	ward2
7500	1540	1915	104	ward2
85000	1230	1963	56	ward2
76000	813	1927	92	ward2
70000	1110	1920	99	ward2
67000	1110	1910	109	ward2
71200	1082	1920	99	ward2
18000	1120	1915	104	ward2
79900	1120	1915	104	ward2
44500	920	1915	104	ward2
52500	920	1915	104	ward2
78000	920	1915	104	ward2
57000	797	1920	99	ward2
74900	1120	1998	21	ward2
75000	1120	1998	21	ward2
37500	1036	1925	94	ward2
30000	1004	1915	104	ward2
37000	1428	1967	52	ward2
59000	1428	1967	52	ward2
105000	1192	1900	119	ward2
73005	1569	1900	119	ward2
30000	896	1930	89	ward2
69000	1574	1915	104	ward2
75900	798	1915	104	ward2
47000	920	1915	104	ward2
62000	884	1920	99	ward2
62000	926	1920	99	ward2
73000	926	1920	99	ward2
55000	896	1942	77	ward2
51955	936	1930	89	ward2
42500	816	1918	101	ward2
66000	816	1935	84	ward2
33000	936	1915	104	ward2
36000	896	1915	104	ward2
1000	1287	1915	104	ward2
11000	1096	1900	119	ward2
20000	1029	1915	104	ward2
3750	1134	1925	94	ward2
31716	1058	1915	104	ward2
27500	1574	1930	89	ward2
29000	1055	1918	101	ward2
30500	1104	1918	101	ward2
60000	792	1915	104	ward2
60000	942	1921	98	ward2
51500	1486	1923	96	ward2
57000	1486	1923	96	ward2
5000	1176	1915	104	ward2
20000	846	1920	99	ward2
45000	1060	1947	72	ward2
59900	1060	1947	72	ward2
69900	1080	1949	70	ward2
84000	930	1910	109	ward2
45000	932	1973	46	ward2
57500	932	1973	46	ward2
62000	953	1927	92	ward2
70500	953	1927	92	ward2
82000	832	1972	47	ward2
65000	988	1978	41	ward2
66500	988	1978	41	ward2
65500	1411	1900	119	ward2
86500	978	1994	25	ward2
48000	848	1928	91	ward2
46500	1024	1925	94	ward2
13381	1478	1890	129	ward2
56800	912	1971	48	ward4
51000	912	1971	48	ward4
71000	912	1971	48	ward4
72500	912	1971	48	ward4
72500	912	1971	48	ward4
58450	912	1971	48	ward4
53000	912	1971	48	ward4
46000	912	1971	48	ward4
60000	912	1971	48	ward4
61500	912	1971	48	ward4
54000	912	1971	48	ward4
53000	912	1971	48	ward4
61000	912	1971	48	ward4
55100	912	1971	48	ward4
69900	912	1967	52	ward4
68000	912	1971	48	ward4
50000	912	1971	48	ward4
71000	1128	1977	42	ward4
59000	1104	1972	47	ward4
68000	912	1971	48	ward4
70000	912	1971	48	ward4
62000	912	1971	48	ward4
51000	912	1974	45	ward4
65000	912	1972	47	ward4
74900	1248	1978	41	ward4
75260	1232	1977	42	ward4
75000	1232	1977	42	ward4
109900	1440	1989	30	ward4
45000	912	1971	48	ward4
48500	912	1971	48	ward4
107800	937	1969	50	ward4
73000	1448	1968	51	ward4
89900	960	1993	26	ward4
62500	936	1981	38	ward4
65900	936	1981	38	ward4
66000	988	1978	41	ward4
77500	988	1978	41	ward4
63500	912	1977	42	ward4
80000	912	1977	42	ward4
78000	896	1977	42	ward4
89000	912	1974	45	ward4
79000	960	1975	44	ward4
87500	960	1975	44	ward4
66000	912	1971	48	ward4
88750	1064	1977	42	ward4
64000	912	1972	47	ward4
74000	912	1970	49	ward4
48500	912	1969	50	ward4
59600	912	1968	51	ward4
50000	1032	1973	46	ward4
69500	1056	1971	48	ward4
67500	1056	1969	50	ward4
56000	952	1974	45	ward4
73500	936	1968	51	ward4
65000	912	1971	48	ward4
75500	912	1971	48	ward4
77500	1064	1968	51	ward4
81900	1192	1964	55	ward4
59900	1056	1971	48	ward4
62000	1056	1971	48	ward4
74000	1056	1971	48	ward4
84000	1076	1978	41	ward4
80150	1076	1978	41	ward4
67900	912	1978	41	ward4
54000	970	1969	50	ward4
151500	1364	1955	64	ward5
144000	1128	1958	61	ward5
78500	1334	1955	64	ward5
93000	1344	1955	64	ward5
89900	1314	1955	64	ward5
118500	1314	1955	64	ward5
129000	1314	1955	64	ward5
140000	994	1935	84	ward5
129000	1328	1992	27	ward5
156000	1906	1995	24	ward5
160000	1906	1995	24	ward5
171000	1906	1995	24	ward5
132000	1608	1998	21	ward5
237000	1300	2004	15	ward5
230000	1300	2004	15	ward5
166750	1840	1994	25	ward5
225000	1892	2005	14	ward5
157000	836	1997	22	ward5
115000	1699	1993	26	ward5
129900	1515	1992	27	ward5
38600	1515	1992	27	ward5
77200	1515	1992	27	ward5
259900	1200	2003	16	ward5
195500	2052	1991	28	ward5
35000	2401	2007	12	ward5
271000	2179	2009	10	ward5
219500	1266	2003	16	ward5
230000	1154	2003	16	ward5
120500	1538	1994	25	ward5
133500	1538	1994	25	ward5
131000	1538	1994	25	ward5
124000	1607	1994	25	ward5
165000	1994	1995	24	ward5
190000	1176	1994	25	ward5
226000	2266	1997	22	ward5
214000	1522	1997	22	ward5
61250	1920	1978	41	ward5
62500	1920	1978	41	ward5
104900	1488	1979	40	ward5
113000	1488	1979	40	ward5
176000	2404	1990	29	ward5
200000	2134	1989	30	ward5
180500	1745	1979	40	ward5
205000	1762	1983	36	ward5
155000	1467	1983	36	ward5
178000	1467	1985	34	ward5
185000	1152	1984	35	ward5
208500	840	1984	35	ward5
186000	1152	1984	35	ward5
199000	1152	1984	35	ward5
134900	1352	1976	43	ward5
94400	1020	1977	42	ward5
125000	1218	1977	42	ward5
150100	1060	1976	43	ward5
70000	1080	1930	89	ward5
45000	1348	1964	55	ward5
112500	1080	1999	20	ward5
120000	864	1977	42	ward5
128000	864	1977	42	ward5
114900	1444	1977	42	ward5
136000	1444	1977	42	ward5
130000	1107	1977	42	ward5
90000	1424	1976	43	ward5
142000	1208	1977	42	ward5
140000	1376	1978	41	ward5
195000	1152	1977	42	ward5
148000	2154	1983	36	ward5
240000	1482	1990	29	ward5
250000	1482	1990	29	ward5
125000	1400	1980	39	ward5
140000	1139	1978	41	ward5
160000	840	1978	41	ward5
157500	1139	1978	41	ward5
142000	1292	1977	42	ward4
145500	1292	1977	42	ward4
100000	1244	1977	42	ward4
140000	1441	1979	40	ward4
119900	1336	1978	41	ward4
114500	1376	1979	40	ward4
124000	1376	1979	40	ward4
155000	974	1981	38	ward4
191500	1612	1981	38	ward4
145000	1180	1978	41	ward4
159000	1168	1978	41	ward4
130000	1505	1978	41	ward4
136000	1505	1978	41	ward4
133000	1080	1978	41	ward4
135000	1740	1978	41	ward4
113500	1512	1978	41	ward4
115200	1456	1978	41	ward4
112000	1140	1978	41	ward4
119000	1140	1978	41	ward4
121000	1393	1978	41	ward4
173000	1816	1977	42	ward4
175000	1816	1977	42	ward4
226000	1816	1977	42	ward4
135000	1344	1990	29	ward4
83500	1095	1969	50	ward4
123900	1440	1971	48	ward4
110000	1232	1973	46	ward4
109900	1064	1971	48	ward4
146000	1632	1995	24	ward4
160000	1632	1995	24	ward4
133000	1422	1971	48	ward4
96900	1372	1973	46	ward4
159000	1589	1973	46	ward4
105000	1728	1970	49	ward4
125500	1728	1969	50	ward4
162500	1567	1972	47	ward4
157400	1567	1972	47	ward4
145000	1764	1968	51	ward4
132500	1372	1966	53	ward4
184900	1708	1969	50	ward4
136500	1412	1966	53	ward5
134000	2444	1968	51	ward5
155000	2444	1968	51	ward5
127000	1596	1967	52	ward5
168900	1596	1967	52	ward5
125000	1780	1967	52	ward5
105000	1536	1967	52	ward5
115500	1536	1967	52	ward5
155500	1536	1967	52	ward5
170000	1016	1966	53	ward5
222000	1561	2004	15	ward5
30500	889	1900	119	ward5
81500	1784	1969	50	ward5
91500	960	1968	51	ward5
89000	1296	1962	57	ward5
162397	1296	1962	57	ward5
55000	994	1900	119	ward5
115000	1739	1996	23	ward5
71000	924	1955	64	ward5