Lab 1: Data Analysis and presentation

Question 1

RAW DATA

Answer 1

Large quantities of data collected when conducting field studies or experiments

Question 2

SUMMARY STATISTICS/DESCRIPTIVE STATISTICS

Answer 2

presentation of data that give an overview of trends in a manner the reader can understand

Question 3

Commonly reported statistics include

Answer 3

1. mean : average
2. minimum values
3. maximum values
4. range
5. standard deviation
6. standard error

Question 4

STATISTICS

Answer 4

a feild of study that provides quantitative tools for summarizing data and testing hypotheses

Question 5

VARIANCE

Answer 5

spread of data around the mean

Question 6

STANDARD DEVIATION

Answer 6

measures the variance ( the spread of data around the mean)

Question 7

mean +/- 1 SD

Answer 7

The value encompasses approx 68% of the dat point in a data set

Question 8

mean +/- 2 SD

Answer 8

The value encompasses approx 98% of the dat point in a data set

Question 9

STANDARD ERROR

Answer 9

It is the measure of how certain we are that a calculated mean is reliable

Question 10

STANDARD DEVIATION

Answer 10

measures the variance ( the spread of data around the mean)

Question 11

mean +/- 1 SD

Answer 11

The value encompasses approx 68% of the dat point in a data set

Question 12

mean +/- 2 SD

Answer 12

The value encompasses approx 98% of the dat point in a data set

Question 13

INFERENCES

Answer 13

reach conclusions about a species or population based on samples of a few individuals

Question 14

NULL HYPOTHESES

Answer 14

That the mean masses of two populations are equal

Question 15

PROBABILITY VALUE, P values

Answer 15

which is the probability or likelihood the null hypotheses is true

Question 16

P-VALUE ranges

Answer 16

0.00 - 1.00

Question 17

The standard P-value for judging whether a null hypotheses is accepted or rejected

Answer 17

.05
< .05 is rejected
> .05 is accepted

Question 18

ANOVA ( Analysis of variance

Answer 18

commonly used to compare 3 or more means rather than 2 means

Question 19

REGRESSION ANALYSIS

Answer 19

a means of determining whether a significant linear relationship exist between 2 or more variables
. It generates the slope of the line fitted to data points , and then tested to see if the slope deviates significantly from zero
Y=AX + B
. If the coefficient (A) slope is positive the relationship between the dependent variable and independent is a direct one and line slopes upward.

.If the regression coefficient is negative : the relationship is inverse and lines slope downwards

Question 20

REGRESSION

Answer 20

The relationship that describes the dependence of one variable on another
its equation : REGRESSION EQUATION