Answer:
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
Mean 5.300 7.100
SD 2.200 3.000
SEM 0.348 0.474
N 40 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
Answer:
The answer to your question is 24.7 ft
Step-by-step explanation:
Data
length of the ladder = 25 ft
distance from the ladder to the ladder = 4 ft
distance from the floor to the ladder = ?
Process
1.- Use the Pythagorean theorem to solve this problem
c² = a² + b²
- solve for b
b² = c² - a²
-Substitution
b² = (25)² - (4)²
-Simplification
b² = 625 - 16
b² = 609
-Result
b = 24.67 ft ≈ 24.7 ft
-Conclusion
The ladder is 24.7 ft from the floor.