Statistics Refresher

Question 1

defined as a set of test scores arrayed for recording
or study.

Answer 1

distribution

Question 2

is a straightforward, unmodified accounting of performance
that is usually numerical.

Answer 2

raw score

Question 3

may reflect a simple tally, as in number of items responded
to correctly on an achievement test.

Answer 3

raw score

Question 4

all scores are listed alongside the number of
times each score occurred. The scores might be listed in tabular or
graphic form

Answer 4

frequency distribution

Question 5

test-score intervals, also called class
intervals, replace the actual test scores. The number of class intervals used
and the size or width of each class interval (or, the range

Answer 5

group frequency table

Question 6

left direction the tail is left the skewed is right

Answer 6

Negatively Skewed

Question 7

Right tail left skewed

Answer 7

Positively Skewed

Question 8

most values are
lower, with fewer high values that stretch the tail to the right. This often
indicates that while most participants score lower, there are outliers with
significantly higher scores

Answer 8

positively skewed distribution

Question 9

in parametric test, population parameter is

Answer 9

known

Question 10

In a non parametric test, population parameter

Answer 10

is uknown

Question 11

parametric is

Answer 11

quantitative study

Question 12

non parametric is

Answer 12

qualitative study

Question 13

T test

Answer 13

compares two variables

Question 14

anova

Answer 14

compares two or more variables

Question 15

chi square

Answer 15

categorical

Question 16

pearson

Answer 16

two continuous varibale

Question 17

regression

Answer 17

predicts dependent continous variable

Question 18

the measurement scale in parametric test are

Answer 18

interval or ratio

Question 19

for non parametric test the measurement scale are

Answer 19

nominal or ordinal can be interval or ratio scale

Question 20

Parametric test are small sample size True or false

Answer 20

False, parametric test are large sample size

Question 21

Non parametric test are large sample size true or false

Answer 21

False they have small sample size

Question 22

The central tendency in parametric test is median. true or false

Answer 22

false, its mean

Question 23

the central tendency in non parametric test is mean, true or false

Answer 23

false its median

Question 24

parametric test are less powerful true or false

Answer 24

false more powerful

Question 25

non parametric test are less powerful true or false

Answer 25

true less powerful

Question 27

Compare distributions of two independent groups

Answer 27

Mann-Whitney U test

Question 28

Compare distributions of two or more independent groups

Answer 28

Kruskal Wallis Test

Question 29

Wilcoxon Signed-rank test

Answer 29

compare two related groups

Question 30

Mcnemar test

Answer 30

2x2 paired proportions or frequency

Question 31

Fisher exact test

Answer 31

2x2 proportions

Question 32

represents the range within which the central
50% of data points lie, providing insight into the dataset’s variability while
minimizing the influence of outliers

Answer 32

IQR

Question 33

It measures how
much individual data points deviate from the
mean (average) of the dataset.

Answer 33

SD

Question 34

A low
standard deviation indicates

Answer 34

The data points are closer to the mean

Question 35

a high
standard deviation signifies

Answer 35

they are
spread out over a wider range of values

Question 36

use to refer to the steepness of a distribution in its
center

Answer 36

Kurtosis