Find critical regions

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 attached file on  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.


Calculate the price of your order

Simple Order Process

Fill in the Order Form

Share all the assignment information. Including the instructions, provided reading materials, grading rubric, number of pages, the required formatting, deadline, and your academic level. Provide any information and announcements shared by the professor. Choose your preferred writer if you have one.

Get Your Order Assigned

Once we receive your order form, we will select the best writer from our pool of experts to fit your assignment.

Share More Data if Needed

You will receive a confirmation email when a writer has been assigned your task. The writer may contact you if they need any additional information or clarifications regarding your task

Let Our Essay Writer Do Their Job

Once you entrust us with your academic task, our skilled writers embark on creating your paper entirely from the ground up. Through rigorous research and unwavering commitment to your guidelines, our experts meticulously craft every aspect of your paper. Our process ensures that your essay is not only original but also aligned with your specific requirements, making certain that the final piece surpasses your expectations.

Quality Checks and Proofreading

Upon the completion of your paper, it undergoes a meticulous review by our dedicated Quality and Proofreading department. This crucial step ensures not only the originality of the content but also its alignment with the highest academic standards. Our seasoned experts conduct thorough checks, meticulously examining every facet of your paper, including grammar, structure, coherence, and proper citation. This comprehensive review process guarantees that the final product you receive not only meets our stringent quality benchmarks but also reflects your dedication to academic excellence.

Review and Download the Final Draft

If you find that any part of the paper does not meet the initial instructions, send it back to us with your feedback, and we will make the necessary adjustments.