1. A set of 50 data values has a mean of 18 and a variance of 4.
I. Find the standard score (z) for a data value = 20.
II. Find the probability of a data value < 20.
(Points : 4)
2. Find the area under the standard normal curve:
I. to the right of z = -0.43
II. to the left of z = -0.43
(Points : 4)
3. Assume that the population of heights of female college students is approximately normally distributed with mean m of 65 inches and standard deviation s of 2.75 inches. Show all work.
(A) Find the proportion of female college students whose height is greater than 67 inches.
(B) Find the proportion of female college students whose height is no more than 67 inches.
(Points : 6)
4. The diameters of grapefruits in a certain orchard are normally distributed with a mean of 6.85 inches and a standard deviation of 0.80 inches. Show all work.
(A) What percentage of the grapefruits in this orchard have diameters less than 6.3 inches?
(B) What percentage of the grapefruits in this orchard are larger than 6.75 inches? (Points : 6)
5. Find the normal approximation for the binomial probability that x = 6, where n = 15 and p = 0.5. Compare this probability to the value of P(x=6) found in Table 2 of Appendix B in your textbook. (Points : 6)
6. A set of data is normally distributed with a mean of 500 and standard deviation of 100.
· What would be the standard score for a score of 433?
· What percentage of scores is between 500 and 433?
· What would be the percentile rank for a score of 433?
(Points : 6)
Time Remaining:
Essay Writing Service Features
Our Experience
No matter how complex your assignment is, we can find the right professional for your specific task. Achiever Papers is an essay writing company that hires only the smartest minds to help you with your projects. Our expertise allows us to provide students with high-quality academic writing, editing & proofreading services.
Free Features
Free revision policy
$10Free bibliography & reference
$8Free title page
$8Free formatting
$8How Our Dissertation Writing Service Works
First, you will need to complete an order form. It's not difficult but, if anything is unclear, you may always chat with us so that we can guide you through it. On the order form, you will need to include some basic information concerning your order: subject, topic, number of pages, etc. We also encourage our clients to upload any relevant information or sources that will help.
Complete the order form
Once we have all the information and instructions that we need, we select the most suitable writer for your assignment. While everything seems to be clear, the writer, who has complete knowledge of the subject, may need clarification from you. It is at that point that you would receive a call or email from us.
Writer’s assignment
As soon as the writer has finished, it will be delivered both to the website and to your email address so that you will not miss it. If your deadline is close at hand, we will place a call to you to make sure that you receive the paper on time.
Completing the order and download