Answer:
Step-by-step explanation:
From the information given :
The null hypothesis
The alternative hypothesis
Given that:
the sample size n = 21
sample standard deviation s = 68
population standard deviation σ = 60
a) The level of significance
b) The chi-square statistics can be calculated as:
The degree of freedom is :
= n - 1
= 21 - 1
= 20
Step-by-step explanation:
Given that,
The length of a rectangle is (0.8x - 1.6) units
Width of a rectangle is (1/4x +1 ) units.
It is assumed to find the area of a rectangle.
AREA = l b, l is length and b is width
So,
Hence, this is the required solution.
Step-by-step explanation:
∠W and ∠Z are supplementary
It’s c i think sorry if i’m wrong
2/10 is one example of a fraction equal to 1/5