Professional Writers
We assemble our team by selectively choosing highly skilled writers, each boasting specialized knowledge in specific subject areas and a robust background in academic writing
Order For Similar Custom Papers & Assignment Help Services
Fill the order form details - writing instructions guides, and get your paper done.
Posted: June 15th, 2022
Home School Academy -STATISTICS N/A -What is the probability that the student guesses
I need help writing my essay – research paper show a step be step solution.Problem 3 (12 points)An unprepared student is about to take his first test of the semester. He is told that his test will be composed of 20 multiple choice questions, each with 4 possible answers, only one of which is correct.a. What is the probability that the unprepared student randomly guesses at the correct response on ONE of the questions and gets the question correct?b. What is the probability that the unprepared student randomly guesses at the correct response on ONE of the questions and gets the question wrong?c. What is the probability that the student guesses at all 20 questions and gets at least one questions correct?Problem 4 (9 points)Spell-checking software catches ânon-word errorsâ which result in a string of letters that is not a word, as when âtheâ is type âteh.â When undergraduates are asked to write a 250-word essay (without spell checking), the number X of non-word errors has the following distribution:Errors (X)01234Probability0.30.250.20.17a. In the table shown above the probability of exactly 4 errors is not given. Using what you know about probability distributions, what is the probability of exactly 4 errors?b. What is the probability of at least 1 non-word error?c. Find the expected value of this distribution. How many non-word errors can you expect from a typical paper written under the previously mentioned conditions?Problem 5 (8 points)Researchers conducted a study to determine whether there were significant differences in graduation rates between medical students admitted through special programs (such as affirmative action) and medical students admitted through the regular admissions criteria. It was found that the graduation rate was 84% for the medical students admitted through special programs.a. If 15 of the students from the special programs are randomly selected, find the probability that exactly 12 of them graduated.b. If 15 of the students from the special programs are randomly selected, find the probability that fewer than 10 of them graduated.Problem 6 (16 points)Assume that the lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation of 7 days.a. What is the probability that a randomly selected mother will have a pregnancy lasting longer than 300 days?b. What is the probability that a randomly selected mother will have a pregnancy lasting shorter than 268 days?c. What is the probability that a randomly selected mother will have a pregnancy lasting between 272 and 284 days?d. Find the 95th percentile for the lengths of pregnancies.
Why choose us
You Want Quality and That’s What We Deliver
Discounted Prices
Our service is committed to delivering the finest writers at the most competitive rates, ensuring that affordability is balanced with uncompromising quality. Our pricing strategy is designed to be both fair and reasonable, standing out favorably against other writing services in the market.
AI & Plagiarism-Free
Rest assured, you'll never receive a product tainted by plagiarism or AI-generated content. Each paper is research-written by human writers, followed by a rigorous scanning process of the final draft before it's delivered to you, ensuring the content is entirely original and maintaining our unwavering commitment to providing plagiarism-free work.
How it works
When you decide to place an order with Nurscola, here is what happens: