Answer:
b. 2.333
Step-by-step explanation:
Test if the mean transaction time exceeds 60 seconds.
At the null hypothesis, we test if the mean transaction time is of 60 seconds, that is:
At the alternate hypothesis, we test if it exceeds, that is:
The test statistic is:
In which X is the sample mean, 
is the value tested at the null hypothesis, s is the standard deviation of the sample and n is the size of the sample.
60 is tested at the null hypothesis:
This means that 
A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds.
This means that 
Value of the test statistic:
Thus, the correct answer is given by option b.
1 liter = 1 dm³ = 1000 cm³.
Therefore 5 cm³ = 5 / 1000 liter = 0.005 liters.
Green eyes.
Answer:
-7
Yep you were right!
Step-by-step explanation:
-3+2(-2)
-3+-4
-7
The answer is 92 estimates 90
Given:
To find:
The missing length marked with a question mark.
Solution:
Let x be the missing value.
We have,
Corresponding sides of similar triangles are proportional, so
Using this, we get
On substituting the values, we get
On cross multiplication, we get
Therefore, the missing length is 56 units.
