Tag: AQA

OPTIONS The design got randomized The design got blocked The design experienced confounding The design got unbalanced ANSWER The design experienced confounding EXPLANATION When main effect comes from higher order interactions, example A + BCD, confounding is said to have occurred, so THE THIRD OPTION...

OPTIONS Blocking Randomization Replication Coding ANSWER Replication EXPLANATION Replication helps to estimate experimental error.

OPTIONS 20 18 11 10 ANSWER 10 EXPLANATION Degree of freedom for a paired t test is n – 1, so 10 is correct.

OPTIONS 0.95 0.9 0.968 0.96 ANSWER 0.968 EXPLANATION P-value of 0.032, 3.2% of risk, which means with 96.8% confidence, the Black Belt can reject the null, so 0.968 is correct.

OPTIONS The statistic of both the groups don’t differ significantly The statistic of both the groups differ significantly The statistic of both the groups are found of a mixed level None of the above ANSWER The statistic of both the groups don’t differ significantly EXPLANATION...

OPTIONS Type III error Type II error Power Type I error ANSWER Power EXPLANATION Power indicates accuracy of a test, so POWER is correct.

OPTIONS The test will have a high chance of errors The risk in the experiment is low The probability of committing a Type I error is high The risk in the experiment is high ANSWER The probability of committing a Type I error is high...

OPTIONS He committed a Type I error He committed a Type II error He committed a Type III error None of the above ANSWER He committed a Type I error EXPLANATION The condition described in the question best meets the description of a Type I...

OPTIONS Z testF testT testANOVA ANSWER T test EXPLANATION Typically for sample size less than 30, one would use the T test.

OPTIONS 36%, 64% 32%, 68% 38%, 62% 40%, 60% ANSWER 38%, 62% EXPLANATION Using standard confidence intervals formula, 38%, 62% is correct.