# STAT 251G Online class Assignment

STAT 251GOnline className_________________________________ Date___________________1. A couple plans to have 3 children. How many possible outcomes are there? Draw a tree diagram to show the sample space. What is the probability that they will have exactly 2 girls and 1 boy?2. Given eight students, three of which are female, if two students are selected at random, without replacement, what is the probability that both students are female? Explain your reasoning.3. On an eight-question true-false quiz, a student guesses each answer. What is the probability that the student gets at least one of the answers correct? Explain your reasoning.4. A business has seven locations to choose from and wishes to rank only the top three locations. How many different ways can this be done? Explain your reasoning.5. The number of cartoons watched on Saturday mornings by students in Mrs. Kelly’s first grade class is shown below.Number of cartoons watched X012345Probability P(X)0.150.200.300.100.200.05Find the mean, variance, and standard deviation. Show the correct formulas and your work.6. Find thezvalue to the right of the mean such that 85% of the total area under the standard normal distribution curve lies to the left of it? Explain how you found your answer..png”>7. The mean weight of loads of rock is 43.0 tons with a standard deviation of 10.0 tons. If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 41.9 tons. Assume that the variable is normally distributed. Show all work, including your sketch of the normal distribution with the correct area shaded.8. Mrs. Smith’s reading class can read an average of 175 words per minute with a standard deviation of 20 words per minute. The top 3% of the class is to receive a special award. What is the minimum number of words per minute a student would need to read in order to get the award? Assume the data is normally distributed. Show all work.

## 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:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
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.

### 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.

### 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.