Anova

Question 1

Why is one concentration zero?

Answer 1

we didn’t have one ppm treatment

Question 2

What is used for COncentrations in ANOVA?

Answer 2

concentration ranking

Question 3

What package did we use?

Answer 3

library(Rcmdr)

Question 4

What do we do after opening?

Answer 4

Data > Import Data > From text file, clipboard, or URL

Question 5

Where is the location of the Data file? (3)

Answer 5

clipboard

under field separator select tab

under decimal point character, select period

Question 6

How do we run an ANOVA?

Answer 6

Statistics > Mean > multiway ANOVA

Question 7

Why are we running an ANOVA?

Answer 7

we have 3 FACTORS that we are going to compare against 5 VARIABLES.

Question 8

what are the factors and variables?

Answer 8

Factors- Concentration Ranking, seed, treatment

variables- Length of Root, Length of Shoot, Weight of Root, Weight of Shoot, and Seeds Germinated

Question 9

What do we do after running an ANOVA?

Answer 9

Compare the three-factor against each variable individually

Question 10

What column is the p-value?

Answer 10

Pr(>F)

Question 11

What do we ignore when looking at the p-value?

Answer 11

three-way interactions

Question 12

What does an interaction displayed by?

Answer 12

a semicolon

Question 13

What do we graph if there is a main effect and interaction>

Answer 13

ignore the main effects and
only graph the interaction.

Question 14

What do we graph if there are main effects and no interaction?

Answer 14

graph each main effect

Question 15

What do we graph if there is no main effect or interaction?

Answer 15

then mention that there are no main
effects or interactions for the specific factors you are analyzing.

Question 16

How do we graph an interaction?

Answer 16

Excel pivot table

copy data set > insert > pivot table > ok

Question 17

What response values do we use for columns, rows, and values?

Answer 17

columns > concentration ranking

rows > treatment

values > length of root

Question 18

What values do we adjust?

Answer 18

sum to average/means

Question 19

What do we do after creating a pivot table?

Answer 19

create two more

Question 20

What are the three pivot tables for?

Answer 20

average

standard deviation

count

Question 21

What is the equation for SE?

Answer 21

Stddev/SQRT(Count)

Question 22

What do we do after creating the three tables?

Answer 22

Copy and paste twice the values of the first table

Question 23

What are the new tables for?

Answer 23

one to make the graph

second to be used for SE for the error bar

Question 24

How do we create a graph?

Answer 24

highlight the means

insert

clustered column

Question 25

How do we add the error bar?

Answer 25

click one of the bar > chart design > add chart element > error bars > more error bar options > custom > specify values

Question 26

How do we graph a main effect? (3)

Answer 26

statistics > numerical summaries > choose your response variable > summarize by group > choose the group > ok

Statistics > mean and standard error

highlight data and copy to excel

Question 27

What do we do after copying to excel?

Answer 27

Highlight column A > Data > text to columns

highlight first 2 columns and insert a clustered column

add error bars