t-test, or t-test. All the should be data. SETUP: It is believed that the larger
ID: 2906622 • Letter: T
Question
t-test, or t-test. All the should be data. SETUP: It is believed that the larger the head circumference the larger the brain volume should be. Given the data your job is to confirm or disprove this assertion. 1. What test/procedure did you perform? Ob. Two-sided t-test Oc. Regression 2. What is the P-value/margin of error? a. 9.30595E-20 Ob. 0.304733709 Oc. 0.022233887 Od. 1.86119E-19 Oe. None of these 3. Statistical interpretation O a. Since P-value is very small we are confident that the average of the first sample is smaller than the other Ob. Since P-value is very small we are very confident that the averages are different. Oc. Since P-value is very small we are confident that the slope of Od. None of these. line is not zero. 4. Conclusion a. Yes, I am confident that the above assertion is correct. Ob. No, we cannot claim that the above assertion is correct.Explanation / Answer
Result:
1.) c). Regression
2). P value
c). 0.0222338
3).
c). since p value is very small we are confident that the slope of regression line is not zero.
4).
a.) yes, I am confident that the above assertion is correct.
Regression Analysis
r²
0.258
n
20
r
0.508
k
1
Std. Error
110.572
Dep. Var.
Volume
ANOVA table
Source
SS
df
MS
F
p-value
Regression
76,512.1003
1
76,512.1003
6.26
.0222
Residual
220,072.8497
18
12,226.2694
Total
296,584.9500
19
Regression output
confidence interval
variables
coefficients
std. error
t (df=18)
p-value
95% lower
95% upper
Intercept
-823.8288
779.8044
-1.056
.3047
-2,462.1371
814.4794
circumference
34.7399
13.8871
2.502
.0222
5.5643
63.9156
Regression Analysis
r²
0.258
n
20
r
0.508
k
1
Std. Error
110.572
Dep. Var.
Volume
ANOVA table
Source
SS
df
MS
F
p-value
Regression
76,512.1003
1
76,512.1003
6.26
.0222
Residual
220,072.8497
18
12,226.2694
Total
296,584.9500
19
Regression output
confidence interval
variables
coefficients
std. error
t (df=18)
p-value
95% lower
95% upper
Intercept
-823.8288
779.8044
-1.056
.3047
-2,462.1371
814.4794
circumference
34.7399
13.8871
2.502
.0222
5.5643
63.9156
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