1In order for accurate measures of the linear relationship b

1.In order for accurate measures of the linear relationship between two variables to be achieved, what type of data are required if using Pearson’s correlation coefficient?

a.Interval

b.Ratio

c.Ordinal

d.Categorical

b.Under what conditions would Spearman’s correlation coefficient be used?

When data are distributed normally.

When data are non-normally distributed.

When data are distributed parametrically.

None of the above.

C..A study undertaken in a surgical ward determined that the use of a specific antibacterial handwash was considered to be the most effective and cost effective. Which of the following results would be considered most significant?

a. p < .01

b.p < .001

c.p < .0005

d. p < .0001

D. Which of the following statements about outliers is not true?

a.Outliers are values very different from the rest of the data.

b.Outliers bias the mean.

c.Outliers bias regression parameters.

d.Outliers are influential cases.

Solution

a) type of data are required if using Pearson’s correlation coefficient is ratio, hence answer is ratio.

b)Spearman’s correlation coefficient be used when the data is normally distributed.

c) P< 0.0001 WILL GIVE US THE SIGNIFICANT VALUE

HENCE OPTION D

d) case which is not true is that outliers that are influential cases as they are not influential