https://goo.gl/forms/x7NUmOxm2DxKmpd62

====== two sample t-test ======
<code>x1 <- rnorm(10, mean=100, sd=15)
x1
t.test(x1, mu=95)
</code>
  - What is the std error value?
  - What if you have a sample with a large size?
    * How do you get your se?

<code>ster <- sd(x1)/sqrt(length(x1))
difx <- mean(x1)-95
tvalue <- difx/ster

difx
ster
tvalue

</code>

<code>x2 <- rnorm(100, mean=100, sd=15)
head(x2)
tail(x2)
t.test(x2, mu=95)

ster <- sd(x2)/sqrt(length(x2))
difx <- mean(x2)-95
tvalue <- difx/ster

difx
ster
tvalue

</code>

<code>mtcars
mtcars$mpg
mtcars$am

t.test(mtcars$mpg~mtcars$am)
</code>

====== one sample t-test 2 ======

<code>a = c(65, 78, 88, 55, 48, 95, 66, 57, 79, 81)
mean(a)
sd(a)

t.test(a, mu=60)
</code>
====== Faired sample t-test ======

<code>sleep

sleep.wide <- data.frame(
    ID=1:10,
    group1=sleep$extra[1:10],
    group2=sleep$extra[11:20]
)
sleep.wide

t.test(sleep.wide$group1 - sleep.wide$group2, mu=0, var.equal=TRUE)
t.test(sleep.wide$group1, sleep.wide$group2, paired=TRUE)
</code>

{{:survey_ms_2017.sav}}
----
gender: male vs. female

<code>T-TEST GROUPS=tend(1 2)
  /MISSING=ANALYSIS
  /VARIABLES=bigco smallco likeprog
  /CRITERIA=CI(.95).
</code>

<code>T-TEST GROUPS=tend(1 2)
  /MISSING=ANALYSIS
  /VARIABLES=selfprom ethalright
  /CRITERIA=CI(.95).
</code>

----
tendency - hum/soc vs. natsc/eng

<code>T-TEST GROUPS=gender(1 2)
  /MISSING=ANALYSIS
  /VARIABLES=bigco smallco likeprog
  /CRITERIA=CI(.95).
</code>

<code>T-TEST GROUPS=gender(1 2)
  /MISSING=ANALYSIS
  /VARIABLES=selfprom ethalright
  /CRITERIA=CI(.95).
</code>
====== ANOVA ======
[[:r/oneway_anova|Oneway ANOVA]]
[[:r/twoway_anova|Twoway ANOVA]]
====== Regression ======
[[:/r/linear_regression|Linear Regression]]
[[:r/multiple_regression|Multiple Regression]]

====== class survey ======

<code>
UNIANOVA bigco BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA smallco BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA allowance BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA workhr BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA selfprom BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA ethalright BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA phmin BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA phpeo BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA textmin BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.

UNIANOVA textpeo BY gender year2
  /METHOD=SSTYPE(3)
  /INTERCEPT=INCLUDE
  /PLOT=PROFILE(gender*year2)
  /EMMEANS=TABLES(gender) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(year2) COMPARE ADJ(LSD)
  /EMMEANS=TABLES(gender*year2) 
  /PRINT=OPOWER ETASQ DESCRIPTIVE
  /CRITERIA=ALPHA(.05)
  /DESIGN=gender year2 gender*year2.
</code>