Tag: AQA

OPTIONS better than one factor at a time testing. model based testing. poka yoke. a careful planned application of the scientific method. ANSWER a careful planned application of the scientific method. EXPLANATION While all the answers have some merits , option D is a lot...

OPTIONS 783 42074 21037 412 ANSWER 21037 EXPLANATION If the sample average is used to estimate the population mean, the confidence that the error will not exceed E is (1-alpha). The same size is computed by the expression: n = Z2sigma2 / E2 n =...

A study was conducted on the relationship between the speed of different cars and their gasoline mileage. The correlation coefficient was found to be 0.35. Later, it was discovered that there was a defect in the speedometers and they had all been set 5 miles...

OPTIONS The total standard deviation is equal to the sum of the standard deviation for the treatment effect plus the standard deviation of the random error. Sum of Square of Errors between the mean and individual values The total sum of squares of deviations from...

Product yield was 86% before an improvement was made. To determine if a 3% change (in either direction) has been made at the 95% confidence level, what sample size should be taken? OPTIONS 514 3671 110 86 ANSWER 514 EXPLANATION For this, we would need...

OPTIONS Kendall coefficient of concordance Mood’s median test Kruskal-Wallis test Spearman Rank correlation coefficient ANSWER Spearman Rank correlation coefficient EXPLANATION The 3 tests in options a, b and c require use of chi-square. “Spearman Rank Correlation Coefficient” is the right answer.

OPTIONS F-Table T-Table Z-Table Chi-Square ANSWER T-Table EXPLANATION Chi-Square and F-tests are used for determining difference in variances between data sets. The Z-table is used for calculating Mean only whenever the standard deviation is known for the population. The t-test distribution is used when the...

Determine the upper control limit (+3 standard deviation) for proportion defective when the average daily output is 1,335 units and the average fraction defective for last 3 months is 0.03%. OPTIONS 0.09 0.044 0.55 0.03 ANSWER 0.044 EXPLANATION For this question, we need p-control chart...

OPTIONS Attribute Data Continuous Data Correlation GRR Measurement Analysis ANSWER Continuous Data EXPLANATION Data like Length, Volume, Temperature, and Time are part of Continuous Data. Data like Defects and Defectives are part of attribute data