28/4=7 Therefore 1/4 of 28 is 7
Answer:
The 90% confidence interval for the difference in mean (μ₁ - μ₂) for the two bakeries is; (<u>49</u>) < μ₁ - μ₂ < (<u>289)</u>
Step-by-step explanation:
The given data are;
Bakery A
<em> </em>= 1,880 cal
s₁ = 148 cal
n₁ = 10
Bakery B
<em> </em>= 1,711 cal
s₂ = 192 cal
n₂ = 10

df = n₁ + n₂ - 2
∴ df = 10 + 18 - 2 = 26
From the t-table, we have, for two tails,
= 1.706


≈ 178
Therefore, we get;

Which gives;

Therefore, by rounding to the nearest integer, we have;
The 90% C.I. ≈ 49 < μ₁ - μ₂ < 289
Answer:
w = -1
Step-by-step explanation:
- w-5-4= -8-6w+8w ⇒ simplify
- w - 9 = - 8 + 2w ⇒ add 9 - 2w to both sides
- w - 2w = - 8 + 9 ⇒ simplify
- -w = 1 ⇒ multiply both sides by -1
- w = -1 ⇒ answer
C because twice the difference of a number and 5
2 (n-5)
or it can be wrtten as 2(x-5)