The data (TET) relates to a study by Reiter and others (1981) concerning the effects of

injecting triethyl-tin (TET) into rats once at age 5 days. The animals were injected with 0,

3, or 6mg per kilogram of body weight (three levels).

The response was the log of the activity count for 1 hour, recorded as 21 days of age. The rat was left to move about freely in a figure 8 maze. In this question, we will choose LOGACT21 as our response, the factor DOSAGE will be considered. (You will choose significance level at .05).

a. One wants to investigate whether Dosage level will have any impact on LOGACT21. Please write out the appropriate linear model.

b. Test the hypothesis that Dosage level will have impact on LOGACT21. Set up the null and alternative hypotheses; Report the P-value and make your conclusion

from SAS result.

IDLOGACT21DosageSex

12.6360Male

22.7360Male

32.7750Male

42.6720Male

52.6530Male

62.5690Male

72.7370Male

82.5880Male

92.7350Male

102.4443Male

112.7443Male

122.2073Male

132.8513Male

142.5333Male

152.633Male

162.6883Male

172.6653Male

182.5173Male

192.7693Male

202.6946Male

212.8456Male

222.8656Male

233.0016Male

243.0436Male

253.0666Male

262.7476Male

272.8946Male

281.8516Male

292.4896Male

302.4940Female

312.7230Female

322.8410Female

332.620Female

342.6820Female

352.6440Female

362.6840Female

372.6070Female

382.5910Female

392.7370Female

402.223Female

412.3713Female

422.6793Female

432.5913Female

442.9423Female

452.4733Female

462.8143Female

472.6223Female

482.733Female

492.9553Female

502.546Female

513.1136Female

522.4686Female

532.6066Female

542.7646Female

552.8596Female

562.7636Female

5736Female

583.1116Female

592.8586Female