Complete 2 short assignments for Statistics Course

PLEASE SEPARATE EACH ASSIGNMENTAssignment #7 Probability 7.1 A jar contains 10 black marbles and 40 white marbles. a. If you randomly select a marble from the jar, what is the probability that you will get a white marble? b. If you are selecting a random sample of n = 3 marbles, and the first 2 marbles are both white, what is the probability that the third marble will be black? 7.2 For each of the following z-scores, sketch a normal distribution and draw a vertical line at the location of the z-score. Then, determine whether the body is to the right or the left of the z-score and find the proportion of the distribution located in the body. a. z = 0.25 b. z = -1.50 c. z = 1.75 d. z = -0.40 7.3 The distribution of scores on the SAT test is approximately normal with µ = 500 and s = 100. a. What proportion of the population have SAT scores above 650? b. What proportion of the population have SAT scores below 540? c. What is the minimum SAT score needed to be in the highest 20% of the population? d. What SAT score separates the top 60% from the rest of the distribution?Assignment #8Sampling Error 8.1 For each of the following, assume that the sample was selected from a population with µ = 75 and s = 20. a. What do you expect the value of M to be in a perfect world with no sampling error, if you have a sample of n = 4 scores? b. What is the standard error of M for a sample of n = 4 scores? c. What do you expect the value of M to be in a perfect world with no sampling error, if you have a sample of n = 25 scores? d. What is the standard error of M for a sample of n = 25 scores? 8.2 A population has a mean of µ = 80 and a standard deviation of s = 10. a. If you select a random sample of n = 4 scores from this population, how much error would you expect between the sample mean and the population mean? b. If you select a random sample of n = 25 scores from this population, how much error would you expect between the sample mean and the population mean? c. How much error would you expect for a sample of n = 100 scores?8.3 Welsch, Davis, Burke, and Williams (2002) conducted a study to evaluate the effectiveness of a carbohydrate-electrolyte drink on sports performance and endurance. Experienced athletes were given either a carbohydrate-electrolyte drink or a placebo while they were tested on a series of high-intensity exercises. One measure was how much time it took for the athletes to run to fatigue. Data similar to the results obtained in the study are shown in the following table: Time to run to fatigue (in minutes) Group Mean SE (standard error) Placebo 21.7 2.2 Carbohydrate-electrolyte 28.6 2.7 a. Construct a bar graph that incorporates all of the information in the table. b. Looking at your graph, do you think that the carbohydrate-electrolyte drink helps performance?

Don't use plagiarized sources. Get Your Custom Essay on
Complete 2 short assignments for Statistics Course
Just from $13/Page
Order Essay
GradeAcers
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.

Order your essay today and save 15% with the discount code DISCOUNT15