Base from problem above, what is the standard deviation of the sample? * Your answer Base from the same problem above. is the test a one-tailed test or two-tailed * test? 0 one-tailed test 0 two-tailed test Base from the same problem above, what is the Critical Value? * Your answer Base from the same problem above. what is the computed t? * Your answer Please round your answer to nearest hundredths except for the critical value. Early in the HIV epidemic. there was poor knowledge of HIV transmission risks * among health care staff. A short training was developed to improve knowledge and attitudes around HIV disease. The result is presented below. The researcher wants to determine if the training is effective in improving knowledge. Base from the data presented, what is the mean difference? M ._|. -r -i _l. 'NI d n4 Your