Question

Listed in the data table are 10 scores for a random sample of subjects with medium load levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts Click the icon to view the data table of IQ scores a. Test the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels What are the null and alternative hypotheses? Assume that population 1 consists of subjects with medium lead levels and population 2 consists of subjects with high lead levels B. Ho 52 H 2 OA. HOH Hp. Hy > O c. Ho Rio H₂ H1 H2 D. Hai The test statistics (Round to two decimal places as needed) The P-value is (Round to three decimal places as needed) Click to select your answer(s). IQ Scores

Answer 1

Ho: M =lla Helgyu aption Al Medium lead level 42,85,92, P5,80,94,P3, 92, 101, 111,91 Xy=89.9091, $y = 10.6907, Mp=11 W) (9.9091 - 87.560) 1.3491 tostat - ( Tu Ja Coscout 4.5244 Y tv 10.6904, 10.530 T' ī = 0.2982 10.30 Piralue for t= 0.30 and dep. 20 Starf (0.30, 1000, 208] P-10.3841 PS 6=0.06 we failed to vajeet. Ito. -chesna ü a insufficient widence In lippol -cher clawin getico b=0.0, dif-20 imut Co.098, 20) = -28.08396 3406 com fidence inted = (x2)++ ore (1.34914 9.0P 896 (4.5244) = (-3491 49.4377) 8.0PP6, 10-488P m -8.09 <y-Msx 10.99) reject Ho , becaust ci contains a