Math 2311 EMCF Homework 5Sections 4.3 - 4.4Honework will NOT be accepted through email or in person. Homework must be su...

Get help with any kind of assignment - from a high school essay to a PhD dissertation

  1. Order Custom Essay, Course Work, Research and Term Papers

Math 2311 EMCF Homework 5

April 14, 2018

Math 2311 EMCF Homework 5
Sections 4.3 - 4.4
Honework will NOT be accepted through email or in person. Homework must be submitted through
CourseWare, https://www.casa.uh.edu, before the deadline. Submit this assignment on CourseWare under
“EMCF” and choose ehw5.

1. True or False: On a statistics exam, Joe’s score was at the 20th percentile and John’s score was at the
40th percentile, thus, we can say that John’s score was twice Joe’s.
a. True
b. False
2. True or False: On the normal curve, the 50th percentile corresponds to the mean.
a. True
b. False
3. If a distribution has a mean of 48 and standard deviation of 3.2, what is the value that corresponds to
a z-score of -1.6?
a.
b.
c.
d.
e.

38.22
42.88
53.12
46.40
none of these

4. Find P (?1.2 < Z < 1.9)
a.
b.
c.
d.
e.

0.9713
0.8562
0.8020
0.7659
none of these

5. Find c such that P (Z > c) = 0.3859
a.
b.
c.
d.
e.

-0.29
0.35
-0.35
0.29
none of these

1

0.04
0.00

density

0.08

Use the following to answer questions 6 - 10: The following is the Normal density curve for the MPG of a
large sedan with a mean of 26.5 mpg and standard deviation 3.7.

15.4

19.1

22.8

26.5

30.2

33.9

6. What proportion of large sedans have a MPG of less than 25.5 mpg?
a.
b.
c.
d.
e.

27%
39.35%
-39.35%
-27%
none of these above

7. What is the probability that a sedan has a MPG greater than 30.5 mpg?
a.
b.
c.
d.
e.

0.86
1.08
0.14
0
none of these above

8. What is the probability that a sedan has between 25.5 and 30.5 mpg?
a.
b.
c.
d.
e.

0.95
0.2535
0.3935
0
none of these above

2

37.6

9. What is the 90th percentile of the MPG of these sedans?
a.
b.
c.
d.
e.

23.85
2.65
31.24
0
none of these above

10. Give the first quartile (Q1 )of the MPG of these large sedans.
a.
b.
c.
d.
e.

6.625
24
29
27.425
none of these above

11. The sampling distributon of a statistic is
a.
b.
c.
d.
e.

The probability that we obtain the statistic in repeated random samples.
The mechanism that determines whether randomization was effective.
The distribution of values taken by a statistic in all possible samples of the same sample size.
The extent to which the sample results differ systematically from the truth.
none of these

Use the following to answer questions 12 - 13: The high temperature in Chicago for the month of August is
approximately normally distributed with mean µ = 80? F and standard deviation ? = 8? F. Suppose we take
a SRS of 16 days in August and want to determine the sample mean, x
¯ high temperature.
12. What is the standard deviation (standard error) of the sample mean high temperature.
a.
b.
c.
d.
e.

8
2
0.5
10
20

13. What is the probability that a random sample of 16 days in August have a sample mean high temperature
of at least 82? F?
a.
b.
c.
d.
e.

0.5987
0.2500
0.1587
0.8413
Cannot be determined.

3

14. The expected value of the sampling distribution of the sample mean is equal to
a.
b.
c.
d.
e.

the standard deviation of the sampling population
the mean of the sampling population
the median of the sampling population
the population size
none of these

15. Power companies kill trees growing near their lines to avoid power failures due to falling limbs in
storms. Applying a chemical to slow the growth of the trees is cheaper than trimming, but the chemical
kills some of the trees. Suppose that one such chemical would kill 15% of sycamore trees. The power
company tests the chemical on 200 sycamores. Consider these a SRS from the population of all sycamore
trees. What is the probability that no more than 32 trees are killed?
a.
b.
c.
d.
e.

0.0571
0.6540
0.3460
0.1598
none of these

4










OUR SERVICE CHARTER






  • 100% Plagiarism-Free Guarantee

    We deliver top-quality essays through employing various measures that seek to improve the content of a given assignment. One of the quality-control systems that we use entails plagiarism checkers. These systems help us to deliver a 100% plagiarism-free papers to our clients. We also value the originality of papers, and we do not resell any submitted paper. It means that every client always gets a unique paper. Additionally, our perfect team of writers is usually keen on the academic writing standards as well as the instructions brief that a client submits. Our team of writers holds matchless competence when it comes to its service delivery. Every member of the team usually has an academic degree, and the team’s diversified skills make it possible for us to have a qualified writer in any client’s area of study. Additionally, our past clients have always given a positive feedback on each of our writers.

  • 100% Confidentiality

    We mind about the interests of our clients holistically. It is for this reason that we maintain high-level confidentiality in regard to our clients’ personal information. Importantly, we use the information for purposes that relate with our services only. The only information that we require relates to our clients’ writing needs. It is also important to note that our clients’ payment information is secure with us. If there is any query in regard to the payment information, then our support team is always willing to provide any clarifications in a prompt manner. Confidentiality extends to the fact that a client made use of our services. It means that we hold our relationship with our clients in secrecy. Importantly, our confidentiality measures beat any advanced security measure that can identify any information regarding our relationship with our clients. It means that our clients transact with us freely without any fear of information leakage.

  • Professional Academic Writers

    An academic degree is one of the qualifications that our writers hold. This is only a minimum requirement that we ask from our writers, but the team also has writers who possess higher educational credentials. It means that the team comprises of competent writers who have gone through institutions of higher learning and passed their exams. Subsequently, the writers have a good grasp of what our clients require. It is notable that our writers not only want to apply their acquired knowledge, but they are also willing to help our clients to outperform them. This is a clear indication of a team that is willing to walk an extra mile. We uphold professionalism in our operations, and our clients should look forward to receive services from a team of experts. It is the spirit of value addition that makes us to scale any heights in order to deliver and outperform our clients’ expectations.

  • 24/7 Customer Support

    Our team of writers prides in high-level competence. The writers have the required expertise that enables them to deliver quality papers that match with the requirements of the grading rubric. In the absence of the rubric, we ensure that the writers follow the clients’ instruction brief to the letter. We can confidently assure our clients to expect nothing short of a pass from the papers that we deliver. Importantly, we have qualified writers who handle different areas of study. This diversification enables us to allot clients’ orders to the writer who is well seasoned in the subject area of study. It also enables the team to become more professional due to specialization. Our clients should put their trust in our service delivery and expect to successfully attain high grades at all times. The fact that we offer free revision reflects our dedication in delivering high quality papers that match with our clients’ expectations.




Related Questions