9.
Since w(-7) = 9 and x equals -7, than you get the same solution.
Answer:
This is the answer I got to this problem.
-6.511
Step-by-step explanation:
Confidence interval = 90% = 0.90.
1 - 0.90 = 0.10
Mean of 15 batch:
724+718+776+760+745+759+795+756+742+740+761+749+739+747+742 = 11253/15
= 750.2
Mean of second batch:
735+775+729+755+783+760+738+780
= 6055/8
= 756.875
Sd = 20
Z-alpha/2 = 1.64
= (750.2-756.875)-1.64*√20²/15 + 20²/8
= -21.0348
(750.2-756.875)+1.64*√20²/15 + 20²/8
= 7.68
2. The upper limit of the interval is less than 10 so in conclusion the difference in mean batch viscosity is about 10 or less than 10
This strategy works because you would want to make sure that the two numbers add up to the number you subtracted it from. Hope this helped and have an awesome day!
Given:
students going to the game = 56
students in each van = 7
number of vans used = unknown; x
The number sentence that can be used to find out how many vans are needed to take the students to the game is:
7 * x = 56
x = 56/7
x = 8 vans needed.