# Stat 230 Ol4 Us2 Sections Final Exam Spring 2015 Complete Solution

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STAT 230 OL4 US2 SECTIONS FINAL EXAM SPRING 2015 COMPLETE SOLUTION

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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.
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.