Basics Biostatistics: Test of Significance and Correlation December 9, 2021December 11, 2021 by pgcracked Test Yourself With Biostatistics: Test of Significance and Correlation Related MCQs Below 3 Created on December 09, 2021 Biostatistics: Test of Significance and Correlation MCQs 1 / 20 Not required for Chi square test (PGMEE 2012) Degree of freedom Proportion in different groups Means in different groups Null hypothesis 2 / 20 Test of significance used for 2 or more groups using qualitative data (proportions): (PGMEE Jan 2019) ANOVA Chi-square test Fischer's test Paired T test 3 / 20 ANOVA is used (PGMEE 2012) To compare means in two groups To compare means in three or more groups To find correlation To compare means in one group before and after intervention 4 / 20 Degree of freedom of contingency table with 3 rows and 6 columns is (PGMEE 2012) 2 3 10 18 5 / 20 Chi square test 5 rows / 4 columns, degree of freedom is (PGMEE 2012, 2013) 9 12 16 20 6 / 20 When we say "the difference is significant" it means that (PGMEE 2012) It is likely by chance and p < 0.05 It is unlikely by chance and p < 0.05 It is likely by chance and p> 0.05 It is unlikely by chance and p > 0.05 7 / 20 When comparing the relationship between two variables, a significant correlation was found between them (P<0.5), though none existed in reality. What type of error is seen in this study? (AIIMS Nov' 2017) Alpha-1 Alpha error Beta error 1-Beta 8 / 20 True statement regarding significance testing is: (PGMEE 2015) Type 1 error is to reject alternate hypothesis when is should be accepted The significant level is always set to 5% Probability associated with type 1 error is significant Type 2 error is to accept alternate hypothesis when it should be rejected 9 / 20 Not true regarding Chi-square test (PGMEE 2015) To test the goodness of fit To find any association between two attributes occurring together To find the significance of difference between two proportions Chi-square curve is negatively skewed 10 / 20 Degree of freedom for a contingency table with 3 rows and 6 columns Is? (PGMEE 2012) 2 3 10 18 11 / 20 Degree of freedom in a 2x2 table is (PGMEE 2015) 1 2 4 0 12 / 20 P value is significant when it is less than (PGMEE 2015) 1 0.5 0.1 0.05 13 / 20 A drug is introduced in the market. Compared with another drug. P value is <0.04. What does it indicate Both are effective Drug A is better than drug B Both the treatment are not effective Data insufficient to conclude 14 / 20 Test of significance used for 2 independent means (PGMEE Jan 2019) Paired t test Unpaired t test ANOVA Chi-square test 15 / 20 Criteria for applying t-test is (PGMEE 2015) Non-Random samples Variable asymmetrically distributed Qualitative data Sample size <30 16 / 20 Which of the following is used to compare two independent means? (PGMEE 2015) Chi-square test Student's test Paired test McNemar's Chi-square test 17 / 20 Correlation coefficient lies between (PGMEE 2013) - 1 to + 1 - 1 to 0 0 to 1 1 to 100 18 / 20 Correlation in height and weight are measured by (PGMEE 2013) Range of variation Coefficient of variation Correlation coefficient None 19 / 20 Mosquito density decreases as height increases in (PGMEE 2013) Positive correlation Negative correlation Zero correlation Bi directional 20 / 20 Strong correlation is signified by correlation coefficient of? Zero 1 Less than 1 Your score is The average score is 60% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Post navigation Pediatrics: Respiratory SystemPlatelet Disorders