Statistics for the Social and Management Sciences

Statistics for the Social and Management Sciences

Of the total employees of an organization only 30% are covered for life insurance. Five employees from this organization are randomly selected. Find the probability that

None of the employees have life insurance.
Exactly two employees have life insurance.
At most three employees have life insurance.
At least four employees have life insurance.
If X represents the number of employees (of the selected five) who have life insurance, show different values of X and its probability, P(X), in a probability distribution table.
Produce a probability distribution graph from the table in part (e), and comment on the shape of this distribution.

A brand of tire is guaranteed to last an average of 25,000 kilometers. The average life of a random sample of 36 such tires was found to be 24,000 kilometers. Assume that the tire life is normally distributed with a standard deviation of 500 kilometers. Do you think you could successfully sue the company for false advertising? (Be careful!)

It is believed that 55% of the students own laptop computers. A random sample of 300 students revealed that 155 of them had laptop computers. Is there evidence that the percentage of students with laptop is more than 55%?

The cafeteria manager claims that 70% of its customers are happy with the quality and price of the food it serves. In a random sample of 500 cafeteria customers, 320 say they are happy with the cafeteria. Does the sample result suggest that fewer than 90% of the customers are happy with the quality and price of the food? Complete a formal hypothesis test using a = 5%.

A random survey of 30 countries across the world yielded an average life expectancy of 62 years with a standard deviation of 6 years. The data appear to be normally distributed. Construct
a 99% confidence interval for the average life expectancy of countries around the world.
a 95% confidence interval for the average life expectancy of countries around the world.
a 90% confidence interval for the average life expectancy of countries around the world.
Comment on the relationship between the level of confidence and the length of the interval.

Hint: Use the Standard Normal Table to calculate p-values, and z-scores as needed.

PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET A GOOD DISCOUNT 🙂

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency

Order your essay today and save 10% with the discount code tCPCOVID10