Statistics project & Quiz 6

MATH 106 QUIZ 6 NAME: _____ __________ _______

Professor: Dr. Katiraie

INSTRUCTIONS

· The quiz is worth 100 points. There are 10 problems (each worth 10 points).

· This quiz is open book and open notes , unlimited time . This means that you may refer to your textbook, notes, and online classroom materials, but you may not consult anyone . You may take as much time as you wish, provided you turn in your quiz no later than the due date posted in our course schedule of the syllabus.

· You must show your work to receive full credit. If you do not show your work, you may earn only partial or no credit at the discretion of the professor. Please type your work in your copy of the quiz, or if you prefer, create a document containing your work. Scanned work is acceptable also. Be sure to include your name in the document.

Consult the Additional Information portion of the online Syllabus for options regarding the submission of your quiz. If you have any questions, please contact me by e-mail ( [email protected] ).

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Refer to the histogram to answer the question.

1) The telephone company kept track of the calls for the correct time during a 24-hour period for two weeks. The results are shown in the histogram below.

What is the probability that a person will make 62 calls?

1) _______

A) 9/14

B) 1/2

C) 1/14

D) 2/7

E) none of the above

2) The telephone company kept track of the calls for the correct time during a 24-hour period for two weeks. The results are shown in the histogram below.

What percentage of people will make less than 61 calls?

2) _______

A) 21.43%

B) 92.86%

C) 28.43%

D) 35.71%

E) None of the above

Prepare a frequency distribution with a column for intervals and frequencies.

3) The following is the number of hours students studied per week on average. Use five intervals, starting with 0 - 4.

2 8 13 18 23 24 16 13 7 2

9 12 19 23 19 12 4 9 15 20 3) _________

A) B)

C) D)

E) None of the above

4) Construct cumulative frequency distribution that corresponds to the given frequency distribution. 4) _________

A) B)

C) D)

E) None of the above

5) The ages of the voters at a poll during a 20-minute period are listed below.

Use five intervals starting with 5) _______

35 29 48 63 64 38 21 23 41 68

61 42 43 47 33 37 46 27 23 30

A) B)

C) D)

E) None of the above

6) Given the following information: 6) _______

Find the cumulative frequency distribution using the above frequencies.

A) B)

C) D)

E) None of the above

7) The students in Mrs. Logan's Spanish class received the following grades on a test. Use four intervals starting with 60 - 69. 7) _______

75 94 87 83 78 72 65 75 82 78 97

72 87 94 72 83 87 95 85 97 69

Arrange the above data into a histogram table.

A) B)

C) D)

E) None of the above

8) The United Way had six large donations: $2657.89, $8237.45, $1682.17, $6271.34, $3918.54, and $5817.57. Find the mean donation.

8) _______

A) $ 5716.99

B) $ 5704.99

C) $ 7146.24

D) $ 4764.16

E) None of the above

9) A mean score of 70 for 6 exams is needed for a final grade of C. Jane's first 5 exam scores are 65, 70, 55, 82 and 87.

Determine the score needed on the sixth exam to get a C in the course.

9) _______

A) 60

B) 72

C) 61

D) 85

E) None of the above

10) Find the mean and standard deviation for the following data. (Round the mean to the nearest hundredth and the standard deviation to the nearest thousandth.)

8.25, 9.85, 10.89, 9.95, 7.85, 2.05 10) ______

A) Mean = 8.39, Standard Deviation = 3.236

B) Mean = 8.59, Standard Deviation = 0.319

C) Mean = 8.19, Standard Deviation = 2.999

D) Mean = 8.14, Standard Deviation = 3.192

E) None of the above