Answer:
20
Step-by-step explanation:
The question states that the sample size is 16 and standard deviation of sampling distribution of sample mean also known as standard error is 5. This information can be written as
σxbar=standard error=5 ,n=sample size=16.
We have to find population standard deviation σ.
We know that
<em>Population standard deviation=</em>σ=4*5=20
Answer:
A
Step-by-step explanation:
In 1 hour, a machine could make:
parts
In 28.8 hours, that machine make
parts
2 because she spent a total of $18 and the books each cost 6 times two will equal 18