Answer:
about 7 cups
Step-by-step explanation:
if he uses 2 cups for 18 cookies, then he uses 1 cup for 9 cookies. the closest whole number you can get is 63 (9 x 7) so he will need about 7 cups of flour for 60 cookies. hope this helps! :)
Answer:
standard error = 2.11
Step-by-step explanation:
First we stablish the data that we have for each sample:
<u>Population 1</u> <u>Population </u>2
n₁ = 100 n₂ = 90
x¯1= 95 x¯2 = 75
σ₁ = 14 σ₂ = 15
To calculate the standard error of each sample we would use the formulas:
σ = σ₁/√n₁
σx¯2 = σ₂/√n₂
Now, in order to obtain the standard error of the differences between the two sample means we combine those two formulas to obtain this:
σx¯1 - σ x¯2 = √(σ₁²/n₁ + σ₂²/n₂ )
So as you can see, we used the square root to simplify and now we require the variance of each sample (σ²):
σ₁² = (14)² = 196
σ₂² = (15)² = 225
Now we can proceed to calculate the standard error of the distribution of differences in sample means:
σx¯1 - σx¯2 = √(196/100 + 225/90) = 2.11
This gives an estimate about how far is the difference between the sample means from the actual difference between the populations means.
Answer:
∛49.
Step-by-step explanation:
1/2 2 and √9 ( = 3) are rational.
∛49 = 3.65930571......
- the number goes on without bounds.
The correct answer would be 2.7 centimeters. Hope this was helpful, and if so, please give Brainliest. (: