SECOND ATTEMP QUIZ

.pdf

School

Brigham Young University, Idaho *

*We aren’t endorsed by this school

Course

221A

Subject

Statistics

Date

May 19, 2024

Type

pdf

Pages

5

Uploaded by UltraThunderSeal92 on coursehero.com

5/17/24, 5:11 AM LO7 Quiz: Group Meeting: Business Statistics LO7 Quiz: Group Meeting e Due May 16 at 11:59pm e Points 13 e Questions 13 o Available May 9 at 12am - May 16 at 11:59pm o Time Limit None e Allowed Attempts 2 Instructions To successfully complete the Group Meeting Quiz, carefully follow the steps below: 1. Meet with your group using Zoom to discuss any questions you have on Part |l of the Individual Preparatlon ASS|gnment which you completed in LO7 Materials: Individual Preparatlon 2. Record your Group Meetlng and post the link and access password to the LO7 Group Collaboratlo Discussion Board (https://byui.instructure.com/courses/292708/discussion_topics/8123304).. 3. After your group has clarified their understanding of Part ll, take the quiz. While you are required to work together on this quiz, each member of the group must submit his or her own answers in order to receive credit. Attempt History Attempt Time Score KEPT Attempt 2 11 minutes 13 out of 13 LATEST Attempt 2 11 minutes 13 out of 13 Attempt 1 70 minutes 7 out of 13 (@ Correct answers will be available on May 17 at 12am. Score for this attempt: 13 out of 13 Submitted May 16 at 9:11pm This attempt took 11 minutes. When calculating anything, please remember to round to three decimal places, unless otherwise specified. DO NOT ROUND until your calculation is complete. https://byui.instructure.com/courses/292708/quizzes/4563791 1/5
5/17/24, 5:11 AM LO7 Quiz: Group Meeting: Business Statistics Question 1 1/1 pts Use the normal probability applet to find the combined area under the standard normal curve that is to the right of z = 1.358 and to the left of z = -1.358. (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would enter 0.898 in the answer box.) 0.175 Use the following information to answer the next 5 questions. Suppose the mean GPA of BYU-lIdaho students is 3.5 and the standard deviation is 0.7. It is well known that this distribution is left-skewed. A random sample of n = 81 students will be drawn. Question 2 1/1 pts What is the mean of the distribution of the sample means (sampling distribution) for all possible samples of size 81 that could be drawn from the parent population of GPAs? (Round your answer to 1 decimal place. Example: If the answer is 1.2873, then you would enter 1.3 in the answer box.) 3.5 Question 3 1/1 pts What is the standard deviation of the distribution of the sample means (sampling distribution) for all possible samples of size 81 that could be drawn from the parent population? (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would enter 0.898 in the answer box.) 0.078 Question 4 1/1 pts What is the probability that the mean GPA for 81 randomly selected BYU-Idaho students will be less than 3.3? (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would enter 0.898 in the answer box.) 0.005 https://byui.instructure.com/courses/292708/quizzes/4563791 2/5
5/17/24, 5:11 AM LO7 Quiz: Group Meeting: Business Statistics Question 5 1/1 pts What is the probability that the mean GPA for 81 randomly selected BYU-ldaho students will be greater than 3.37? (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would enter 0.898 in the answer box.) 0.995 Question 6 1/1 pts What is the shape of the distribution of sample means X, where 81 students are selected in each of the possible random samples? Left-skewed Right-skewed Approximately normal We cannot determine this from the information given. Use the following information to answer the next 4 questions. Scores on the quantitative portion of the GRE are approximately normally distributed with mean 1 = 150.8 and standard deviation o = 8.8. Source: ETS Question 7 1/1 pts Dianne earned a score of 160 on the quantitative portion of the GRE. What is the z-score corresponding to Dianne’s score? (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would enter 0.898 in the answer box.) 1.045 z = (x - y)fo= (160 - 150.8)/8.8 = 1.04545 Question 8 1/1 pts What is the probability that a randomly selected student will score above 160 on the quantitative portion of the GRE? (Round your answer to 3 decimal places. Example: If the answer is 0.8976 then you would https://byui.instructure.com/courses/292708/quizzes/4563791 3/5
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help