Stat 230 Ol4 Us2 Sections Final Exam Spring 2015 Complete Solution

1926 Words Jun 4th, 2015 8 Pages
STAT 230 OL4 US2 SECTIONS FINAL EXAM SPRING 2015 COMPLETE SOLUTION

http://www.coursehomework.com/product/stat-230-ol4-us2-sections-final-exam-spring-2015-complete-solution/
Contact us at:
 +1 315-750-4434
 help@coursehomework.com
STAT 230 OL4 US2 SECTIONS FINAL EXAM SPRING 2015 COMPLETE SOLUTION. GET AN A++.
STAT 230
OL4 / US2 Sections
Final Exam
Spring 2015
The final exam will be posted at 12:01 am on May 8, and it is due at 11:59 pm on May 10, 2015. Eastern Time is our reference time.
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed.
…show more content…
It is easier to reject the null hypothesis if we use a smaller significance level α.
Refer to the following frequency distribution for Questions 2, 3, 4, and 5. Show all work. Just the answer, without supporting work, will receive no credit. A random sample of 25 customers was chosen in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon. The frequency distribution below shows the distribution for checkout time (in minutes). Checkout Time (in minutes)
Frequency
Relative Frequency

1.0 - 1.9
4

2.0 - 2.9 0.4

3.0 - 3.9

4.0 - 4.9
5

Total
25

2.
Complete the frequency table with frequency and relative frequency.
(5 pts)
3.
What percentage of the checkout times was at least 3 minutes?
(5 pts)
4.
In what class interval must the median lie? Explain your answer.
(5 pts) 1. Assume that the largest observation in this dataset is 4.8. Suppose this observation were incorrectly recorded as 8.4 instead of 4.8. Will the mean increase, decrease, or remainthe same? Will the median increase, decrease or remain the same? Why? (5 pts) Refer to the following information for Questions 6, 7, and 8. Show all work. Just the answer, without supporting work, will receive no credit. A 6-faced die is rolled two times. Let A be the event that the outcome of the first roll is an even number, and B be the

Related Documents