Question

1. Create a confidence interval for a population mean and interpret it. Use either 90 95 or 99 percent confidence interval. Do this for each quantitative question. Remember to interpret the confidence intervals. CREATE CONFIDENCE INTERVAL FOR PRICE AND SIZE

2. record	Agent	Price	Size	Bedrooms	Baths	Pool (yes is 1)	Garage (Yes is 1)	Days	Township	Mortgage type	Years	FICO	Default (Yes is 1)
   1	Marty	206424	1820	2	1.5	1	1	33	2	Fixed	2	824	0
   2	Rose	346150	3010	3	2	0	0	36	4	Fixed	9	820	0
   3	Carter	372360	3210	4	3	0	1	21	2	Fixed	18	819	0
   4	Peterson	310622	3330	3	2.5	1	0	26	3	Fixed	17	817	0
   5	Carter	496100	4510	6	4.5	0	1	13	4	Fixed	17	816	0
   6	Peterson	294086	3440	4	3	1	1	31	4	Fixed	19	813	0
   7	Carter	228810	2630	4	2.5	0	1	39	4	Adjustable	10	813	0
   8	Isaacs	384420	4470	5	3.5	0	1	26	2	Fixed	6	812	0
   9	Peterson	416120	4040	5	3.5	0	1	26	4	Fixed	3	810	0
   10	Isaacs	487494	4380	6	4	1	1	32	3	Fixed	6	808	0
   11	Rose	448800	5280	6	4	0	1	35	4	Fixed	8	806	1
   12	Peterson	388960	4420	4	3	0	1	50	2	Adjustable	9	805	1
   13	Marty	335610	2970	3	2.5	0	1	25	3	Adjustable	9	801	1
   14	Rose	276000	2300	2	1.5	0	0	34	1	Fixed	20	798	0
   15	Rose	346421	2970	4	3	1	1	17	3	Adjustable	10	795	0
   16	Isaacs	453913	3660	6	4	1	1	12	3	Fixed	18	792	0
   17	Carter	376146	3290	5	3.5	1	1	28	2	Adjustable	9	792	1
   18	Peterson	694430	5900	5	3.5	1	1	36	3	Adjustable	10	788	0
   19	Rose	251269	2050	3	2	1	1	38	3	Fixed	16	786	0
   20	Rose	547596	4920	6	4.5	1	1	37	5	Fixed	2	785	0
   21	Marty	214910	1950	2	1.5	1	0	20	4	Fixed	6	784	0
   22	Rose	188799	1950	2	1.5	1	0	52	1	Fixed	10	782	0
   23	Carter	459950	4680	4	3	1	1	31	4	Fixed	8	781	0
   24	Isaacs	264160	2540	3	2.5	0	1	40	1	Fixed	18	780	0
   25	Carter	393557	3180	4	3	1	1	54	1	Fixed	20	776	0
   26	Isaacs	478675	4660	5	3.5	1	1	26	5	Adjustable	9	773	0
   27	Carter	384020	4220	5	3.5	0	1	23	4	Adjustable	9	772	1
   28	Marty	313200	3600	4	3	0	1	31	3	Fixed	19	772	0
   29	Isaacs	274482	2990	3	2	1	0	37	3	Fixed	5	769	0
   30	Marty	167962	1920	2	1.5	1	1	31	5	Fixed	6	769	0

Answer 1

Prece let los be Q = 0.05 m = 30, dfan-l: 29 i = 360048.2 s 117832.5054 p. 045 (from t-table) Edl (HF) = t. (299 0.025 = 1:) | sb X Ft (slo) 360048.2 +2.045 117839.5054 V20 360048.2 + 43994.440 vory 95.). Ut (316053. 76, 404042.64) we eܡܘ 95% confident that the true Ps between 316053. 76 and mean for prece 404042.64 10 ) size: m: 30, tere: 2.045, X : 3476.333, 3 =1094.867 95.6.c.IHeslon) : 3476.333 +2.045/1094.867 2.045(1094.867) 30 3476.333 I 408.784 95-1. LI (3067.549, 3885.117) are 95% confident the true mean for Size PS between 3067.549 § 3885.117. we