KWffrd6661
23.09.2021 •
Mathematics
(−2/3) x (5/4) =
test pls help
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Ответ:
The answer is -5/6
Step-by-step explanation:
in pic
(hope this helps can I pls have brain list (crown) ☺️
Ответ:
There is significant difference between the two average times
Step-by-step explanation:
This test would be comparison of two means where only sample variances and means are given.
Since variances are unequal we have to do t test for unequal variances.
(Two tailed test)(x represents grou I cars, and Y group 2 trucks)
Group Group One Group Two
Mean5.3007.100
SD2.2003.000
SEM0.3480.474
N40 40
The mean of Group One minus Group Two equals -1.800
standard error of difference = 0.588
t = 3.0601
df = 78
The two-tailed P value equals 0.0030
Since p <1% we reject null hypothesis
There is significant difference between the two average times