QuestionQuestion

2. A classmate has estimated that life expectancy worldwide is probably 72 years. In order to test this, you identify a dataset created by the United Nations that tracks average life expectancy, income, and educational attainment across countries. Open the file on Blackboard named “Human Development” and identify the life expectancy variable. You will use this data as your sample to test the hypothesis: Average life expectancy worldwide is 72 years old.
Recall the steps to hypothesis testing:
1) Establish a null and alternate hypothesis
2) Choose a decision rule (a level of significance)
3) Find critical regions
4) Draw the sample
5) Calculate the test statistic
6) Make the decision

Let’s establish a null and alternate hypothesis together
       H0: μ = 72
       HA: μ ≠ 72

Choose a decision rule (a level of significance)
Let’s set our level of significance at: 0.05

2a. Find critical regions
What is the critical value? (Consider how many tails and which test to use based on sample size)

2c. Draw the sample
Sample Mean =
Sample Standard deviation =
Standard Error =

2d. Calculate the test statistic
Test statistic =

2e. Make the decision
Do you reject or fail to reject the null hypothesis?
Articulate your findings in written words:

2f. Compute a 95% confidence interval.
Confidence Interval =

What does this mean? Articulate this in written words.

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

2a
H0: Average life expectancy worldwide μ = 72

HA: Average life expectancy worldwide μ ≠ 72


2b
level of significance at: 0.05

This is two tailed...

By purchasing this solution you'll be able to access the following files:
Solution.docx.

50% discount

Hours
Minutes
Seconds
$20.00 $10.00
for this solution

or FREE if you
register a new account!

PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

Find A Tutor

View available General Statistics Tutors

Get College Homework Help.

Are you sure you don't want to upload any files?

Fast tutor response requires as much info as possible.

Decision:
Upload a file
Continue without uploading

SUBMIT YOUR HOMEWORK
We couldn't find that subject.
Please select the best match from the list below.

We'll send you an email right away. If it's not in your inbox, check your spam folder.

  • 1
  • 2
  • 3
Live Chats