Answer:

Step-by-step explanation:
Given

Required
Solve
We have

Using a calculator

Approximate

Answer:
Check the explanation
Step-by-step explanation:
Below are the null and alternative Hypothesis,
Null Hypothesis, H0: μ = 300000
Alternative Hypothesis, Ha: μ < 300000
Test statistic,
z = (xbar - mu)/(sigma/sqrt(n))
z = (288000 - 300000)/(80000/sqrt(25))
z = -0.75
P-value Approach
P-value = 0.2266
As P-value >= 0.05, fail to reject null hypothesis.
With this question, you are just going to add up the three numbers
1,300 + 1,400 + 1,500
This equals 2,200
Hope I helped!
Answer:
ill right what is the question?
Step-by-step explanation: