BIOSTAT

Question 1

Sometimes called as measures of position. A measure can tell us whether a value is about the average, or whether it’s unusually high or low.

Answer 1

POINT MEASURES

Question 2

are three values that split sorted data into four parts, each with an equal number of observations.

Answer 2

Quartiles

Question 3

Is Q1 a lower quartile, median, or upper quartile?

Answer 3

lower quartile

Question 4

Is Q2 a lower quartile, median, or upper quartile?

Answer 4

Median

Question 5

Is Q3 a lower quartile, median, or upper quartile?

Answer 5

upper quartile

Question 6

split the data into ten parts: The 10th, 20th, 30th, 40th, 50th, 60th, 70th, 80th, 90th and 100th percentiles.

Answer 6

Decile

Question 7

defined as the difference between the third and the first
quartile in the set of data. In symbol: IQR = Q3 - Q1

Answer 7

Interquartile Range

Question 8

are unusual values that fall outside of an expected range of values.

Answer 8

Outliers

Question 9

is a number where a certain percentage of scores fall below that number.

Answer 9

Percentiles

Question 10

is an overview of your data. The statistics in the summary are the smallest value (minimum), the largest (maximum), the middle (median) and the first and third quartiles.

Answer 10

Five number summary

Question 11

shows the spread and center of data. It is a graphical representation of the five number summary.

Answer 11

Box and Whiskers Plot

Question 12

are a way to compare results from a test to a
“normal” population. The z-scores indicates how many standards a score is from the
mean.

Answer 12

Standard scores

Question 13

-The simplest and easiest measure of variability.
- The difference between the lowest value and the highest value in set of data.
- For group data, range is the difference between upper limit of the highest-class interval and the lower limit of the lowest class interval.
- Most unreliable because its magnitude depends only on the extreme

Answer 13

Range

Question 14

Three kinds of Range

Answer 14

Absolute Range, Total Tange, & Kelly Range

Question 15

getting the difference between highest and lowest score.

Answer 15

Absolute Range

Question 16

is the difference by subtracting lowest score from the highest score + 1.

Answer 16

Total Range

Question 17

subtracting the 10th percentile from the 90th percentile.

Answer 17

Kelly Range

Question 18

obtained by taking half the difference of the third and the first quartile.

Answer 18

Semi-interquartile range or Quartile Deviation

Question 19

Defined as the average deviation of all observation from the mean. We can compute how far observations deviate from the mean by subtracting the mean from the values of each observation.

Answer 19

Mean Deviation

Question 20

Is the mean of the squared deviation of the observations for their arithmetic mean.

Answer 20

Variance (s^2)

Question 21

The most widely used measure of variations. It is the square root of the variance.

Answer 21

Standard Deviation

Question 22

the ratio of standard deviation and the mean, which is express in percent.

Answer 22

Coefficient of Variations