Question

The method of tree ring dating gave the following years A.D. for an

The me of tree nng dating Udve the following years A D. r an archaeolog cal excavation site. Assum e that the populatio of κ values has an appr u mately nurmal distribution. 1299 1292 1222 1229 1268 1316 1275 1317 127 (a) Use a calculator with mean and standard deviation keys to tind the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole number.) (b) Firnd a 90⅔ comfldenca interval forthe mean at all tree ring dates from trls arenaealogical te. 【Round ynur answers tote nearest whla number. ower limit upper limit

Answer 1

e metho e x cavatien Asumeothe popu lalien 04 x value s has an approxima-le ly OPU 104.08) bulion 2 1292 1232 ,229 126013161275 13 ,275 2 299 634 4ol 6692 64 H93 28H J22 2 2. 1260 1316 2 7S 317 158子600 j731256 ,734489 162 S 62S

2 Sample meon Ex aim ple mea n X 9 2 466558s-9 (246.11 3 9474.4 3 2-

S-、11184. 30,25 う) S 3 4.41 1 12구6-11-1. 36 -1834 で) , 1246.11+1.86(34。 어 31263-4 3 *, (^1296. 11 -ai. 3342 , ,276-11 t 21 .3342

| )254 '구子58 , 4442 129