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

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Jun 4th, 2015
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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.

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.

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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

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