Angle DFE. Hope this helped.
Answer:
The answer is B
Step-by-step explanation:
Answer: (x,y)=(3,2)
Step-by-step explanation:
2x+4y=14 x=3
2(3)+4y=14
6+4y=14
4y=8
y=2
(x,y)=(3,2)
Answer:
IQR = 8
Step-by-step explanation:
IQR is the difference between the 3rd quartile (12 in this case) and the 1st quartile (4 in this case)
Answer: Z is less than Zc ∴ 1.342 < 1.96
Therefore, Null hypothesis is not Rejected.
There is no sufficient evidence to claim that students turning in their test first score is significantly different from the mean.
Step-by-step explanation:
Given that;
U = 75
X = 78
standard deviation α = 10
sample size n = 20
population is normally distributed
PROBLEM is to test
H₀ : U = 75
H₁ : U ≠ 75
TEST STATISTIC
since we know the standard deviation
Z = (X - U) / ( α /√n)
Z = ( 78 - 75 ) / ( 10 / √20)
Z = 1.3416 ≈ 1.342
Now suppose we need to test at ∝ = 0.05 level of significance,
Then Rejection region for the two tailed test is Zc = 1.96
∴ Reject H₀ if Z > Zc
and we know that Z is less than Zc ∴ 1.342 < 1.96
Therefore, Null hypothesis is not Rejected.
There is no sufficient evidence to claim that students turning in their test first score is significantly different from the mean.
