ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 466 - 467 of 472

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Question 466

Question

MCQ▾

Which of the following statements is incorrect for calculation of median for Individual series?

Statement 1: If the number of observations is odd then median is the observation in the arranged order

Statement 2: If the number of observations is even then the median is the mean of and observations in the arranged order.

Choices

Choice (4)Response

a.

Statement 1 and 2 is correct

b.

Only Statement 2 is correct

c.

Statement 1 and 2 is incorrect

d.

Only Statement 1 is correct

Question 467

Question

MCQ▾

A physician is interested in the effect of an anesthetic on reaction times. Two groups are compared, one with (A) and one without (B) taking the anesthetic. Subjects had to react on a simple visual stimulus. Reaction times are not normally distributed in this experiment, so data is analyzed with the Mann-Whitney U-Test for ordinal scaled measurements. The table below shows the rank-ordered data:

The Table Shows the Rank-Ordered Data
Mean RTRankGroup
1311B
1352A
1383.5B
1383.5B
1395A
1416B
1428B
1428A
1428B
14310B
14411A
14512B
15613B
15814A
16515A
16716B
17117A
17818A
19119B
23020B
24421A
24522A
25623A
26724A
26825A
28926A

The Correct conclusion is

Choices

Choice (4)Response

a.

b.

The anesthetic group shows significantly slower reaction times than the non-anesthetic group

c.

The observed value is greater than the Z-value

d.

All a., b. and c. are correct