Answer:
Z-test is a statistical test used to check weather two means are significant or not for unknown variance and large sample size.
Z = (M - μ) ÷ √(σ² / n)
where, M = Sample Mean = 66.075
μ = Population Mean = 90
σ² = Population Variance = 15
Now, Calculating the value of Z-test:
Z = (66.075 - 90) ÷ √(225 ÷ 40)
Z = -23.925 ÷ 2.37171
Z = -39.06936
The value of Z is -39.06936.
The value of p is < .00001 at 90% confidence level.
If the p-value is less than value of α, We accept the null- hypothesis otherwise reject.
The result is significant at p < .10.
Thus, we accept the null hypothesis.
Answer:
A=h(b)b____2
Step-by-step explanation:
i think its right, because I find it in Google
Answer:
Width of Rectangle is 6 cm.
Length of Rectangle is 38 cm
Step-by-step explanation:
Given:
Area of Rectangle =
Perimeter of rectangle = 88 cm
Let width be x cm
according to given data Length =
Solution:
Formula for Perimeter of Rectangle =
Substituting the above given data in the stated formula we get.
Dividing both sides by 2 we get
Subtracting both side by 8 we get.
Dividing both side by 6 we get.
Width of the rectangle is 6 cm
Now length=
Length of the rectangle is 38 cm
Answer:
Step-by-step explanation:
If you are dividing fractions use KCF keep it change it flip it keep the first fraction change division to multiply and flip the last fraction
Answer:
3a - b = 1
Step-by-step explanation:
a = (2-3)
b = (1-5)
Substitute the values of a and b to the 3a-b.
3(2-3) - (1-5)
6-9 - (-4)
6 - 9 + 4
-3 + 4
= 1
Therefore, 1 is the answer.