Math 225n 2020 Study guides, Class notes & Summaries

MATH 225N Week 6 Statistics Quiz 2020 – Chamberlain College of Nursing Week 6 Quiz Question 1 A statistics professor recently graded final exams for students in her introductory statistics course. In a review of her grading, she found the mean score out of 100 points was a x¯=77, with a margin of error of 10. Construct a confidence interval for the mean score (out of 100 points) on the final exam. That is correct! Answer: (67, 87) Question 2 A random sample of adults were asked whether they p...

MATH 225N WEEK 8 QUESTIONS WITH ANSWERS Performing Linear Regressions with Technology An amateur astronomer is researching statistical properties of known stars using a variety of databases. They collect the absolute magnitude or MV and stellar mass or M⊙ for 30 stars. The absolute magnitude of a star is the intensity of light that would be observed from the star at a distance of 10 parsecs from the star. This is measured in terms of a particular band of the light spectrum, indicated ...

MATH 225N Week 6 Assignment 2020 - Chamberlain College of Nursing | Confidence Interval for Mean – Population Standard Deviation Known Find the sample size required to estimate a population mean with a given confidence level Question The population standard deviation for the number of corn kernels on an ear of corn is 94 kernels. If we want to be 90%confident that the sample mean is within 17 kernels of the true population mean, what is the minimum sample size that should be taken? z0.101.2...

Math 225N Week 8 Questions and Answers 2020 – Chamberlain College of Nursing Performing Linear Regressions with Technology An amateur astronomer is researching statistical properties of known stars using a variety of databases. They collect the absolute magnitude or MV and stellar mass or M⊙ for 30 stars. The absolute magnitude of a star is the intensity of light that would be observed from the star at a distance of 10 parsecs from the star. This is measured in terms of a particular b...

Math 225N Week 5 Assignment (2020) - Central Limit Theorem for Proportions (Answered)

MATH 225N Week 2 Statistics Quiz Question with Answers all correct 2020 solution docx A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the device for governmental approval and has decided to test the claim "The glucose level reported by the wristband is within 10% of a standard blood test result." Which of the following data collection processes would be appropriate? Select on...

MATH 225N Week 8 Final Exam - Question, Answers & Explanation MATH 255 WEEK 8 FINAL Question 1 · 1/1 points A fitness center claims that the mean amount of time that a person spends at the gym per visit is 33 minutes. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter μ. That is correct! H0: μ≠33; Ha: μ=33 H0: μ=33; Ha: μ≠33 H0: μ≥33; Ha: μ<33 H0: μ≤33; Ha: μ>33 Answer Explanation Correct answer: H0: μ=33; H...

Math 225N Week 5 Assignment (2020) : Central Limit Theorem for Means – Chamberlain College of Nursing 1. Question A family of statisticians is trying to decide if they can afford for their child to play youth baseball. The cost of joining a team is normally distributed with a mean of $750 and a standard deviation of $185 . If a sample of 40 teams is selected at random from the population, select the expected mean and standard deviation of the sampling distribution below. Correct answer...

MATH 225N Week 1 Assignment Comparing Sampling Methods Q & A A television station plans to send a crew to a polling center on an election day. Because they do not have time to interview … each individual voter, they decide to count voters leaving the polling location and ask every 20th voter for an interview. What type of sampling is this? In order to study the shoe sizes of people in his town, Billy samples the population by dividing the residents by age and randomly … selecting a proportio...

MATH 225N Week 5 Assignment quiz answers. 1. An organization has members who possess IQs in the top 4% of the population. If IQs are normally distributed, with a mean of 100 and a standard deviation of 15, what is the minimum IQ required for admission into the organization? 2. The top 5% of applicants on a test will receive a scholarship. If the test scores are normally distributed with a mean of 600 and a standard distribution of 85, how low can an applicant score to still qualify for a scholar...