biostatistics and research methodology

Sample size for Z-test

• n<30

• n>30

• n=k

• None of above

Parametric test used to test the significance between means of two samples which are independent

• Pooled t-test

• Paired t-test

• One sample t-test

• None of above

If the tabular value of F-ratio is less than calculated F-value

• Null hypothesis rejected

• Alternate hypothesis rejected

• Alternate hypothesis accepted

• Both a and c options

F-ratio for one way ANOVA is the ratio of

• Mean of square between sample to mean of square within sample

• Sum of square between sample to sum of square within sample

• Mean of square of columns to mean of square of rows

• None of above

Degree of freedom for residual variance in two way ANOVA is given by

• c.r-1

• (c-1)(r-1)

• r-1

• n-1

Signed rank test has characteristics such as

• Follows binomial distribution

• Has magnitude

• Has positive and negative sign to ranks

• All of the above

Mann whitney U-test is applicable for

• Independent and unpaired data

• Paired or matched data

• Both of above

• None of above

Kruskal Wallis test has degrees of freedom as

• n-1

• k-1

• n-k

• None of above

Chi square test tests

• Goodness of fit

• Signifocance of association between two attributes

• Test of homogenity

• All of the above

Friedman test is used when

• There are more than 2 treatment groups with paired data

• When distribution is not known and ANOVA cannot be applied

• Both of above

• None of above