Overview

m08
m09


Sheet 1: m08


white marbles x blue marbles y striped marbles/g

5.85 6.3 6.4

6.4 5.75 6

6.31 4.85 6.12

6.2 6 6.15

6.25 6.45 6.17
n 5 5 5
mean 6.2 5.87 6.17
sx 0.21 0.63 0.15
standard error of the mean for two independent samples 0.3 0.29
df 4 4
alpha 0.05 0.05
tcritical 2.78 2.78
margin of error E 0.83 0.8
mean difference xd 0.33 -0.3
Indep t-test white vs blue blue vs striped
lower bound -0.49 -1.1
upper bound 1.16 0.51
mean difference xd 0.33 -0.3
p-value 0.32 0.36
max confidence level c 0.68 0.64
stat sig at α = 0.05? no no
fail to reject or reject? fail to reject fail to reject























Sheet 2: m09


white marbles x blue marbles y striped marbles/g

6 5.38 6.4

6.1 5.65 6

4.9 5.53 6.12

5.95 5.77 6.15

5.83 4.45 6.17

6.05 4.85

5.9 4.89


4.9
n 7 8 5
mean 5.82 5.18 6.17
sx 0.42 0.47 0.15
standard error of the mean for two independent samples 0.23 0.18 0.17
df 6 4 4
alpha 0.05 0.05 0.05
tcritical 2.45 2.78 2.78
margin of error E 0.56 0.49 0.47
mean difference xd 0.64 -0.99 -0.35
Indep t-test white vs blue blue vs striped white vs striped
lower bound 0.08 -1.48 -0.82
upper bound 1.2 -0.5 0.12
mean difference xd 0.64 -0.99 -0.35
p-value 0.0147 0.0004 0.07
maximum conf c 0.9853 0.9996 0.93
stat sig at α = 0.05? yes yes no
fail to reject or reject? reject reject fail to reject