Answer:
for part b. the probability fraction is 17 over 20, or 17/20.
Step-by-step explanation:
the percentage of 65 years or older is 85% of the population. 85/100 simplified is 17/20.
Answer:
We do not reject the Null Hypothesis
Step-by-step explanation:
From the question we are told that:
Sample size 
Population mean 
Sample mean 
Standard deviation 
Significance level 
Generally the Null and and alternative Hypothesis are as follows


Therefore t critical Value is


Where

Therefore
From t Table

Generally the equation for Z Critical is mathematically given by



Therefore
Since the t test statistics is greater than the Critical value
Hence,we do not reject the Null Hypothesis
Answer:
Step 1: Identify the Problem. ...
Step 2: Analyze the Problem. ...
Step 3: Describe the Problem. ...
Step 4: Look for Root Causes. ...
Step 5: Develop Alternate Solutions. ...
Step 6: Implement the Solution. ...
Step 7: Measure the Results.