Frequency Distribution for Statistics Quiz Grades

Frequency Distribution for Statistics Quiz Grades

Instructions/Descriptions

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QUESTION 1

1. A class of 18 students is holding elections for class president, vice-president and secretary. How many different ways can the officers be elected? 

5 points

QUESTION 2

1. A Cafeteria offers the following vegetables for lunch: carrots, green beans, corn, broccoli, and sprinach. The menu indicates that two vegetables may be selected. How many ways can the vegetables be chosen? 

5 points

QUESTION 3

1. Grades on a statistics quiz for a random sample of 20 students are as follows:

2. 
   (a) Make a frequency table. Use 5 classes.1st: Find the class width 2nd: Fill in the following table (use textbook guidelines -i.e. lowest data value as lower class limit of first class)

23 points

QUESTION 4

1. (b) Draw a RELATIVE frequencyhistogram from the information in part (a) Be sure to provide a title for your histogram and label vertical and horizontal axes. (Use textbook guidelines)Use attached graph paper to draw histogram or purchase graph paper if you can’t print out the attachment. Histogram must be on graph paper to be graded. Scan completed histogram and post back to the question. NO COMPUTER GENERATED HISTOGRAMS WILL RECEIVE CREDIT.

   
   

   1. Attach File

13 points

QUESTION 5

1. A random sample of 12 skiers at a Vail, Colorado ski resort gave their age. The results are

2. 
   Use the attached form to find descriptive statistics for this set of data. Must show work to receive credit. USE TEXTBOOK FORMULAS – do not use formulas found online. Save to your computer and post back here using the “Browse local files” link.
   1. Attach File

24 points

QUESTION 6

1. For 50 airplanes that arrived late at an airport during a week, the time by which they were late was observed. The following table is a frequency distribution for this sample. Fill in the blanks and use the totals to find mean and standard deviation of the grouped data in the next problem.
   (do not round calculations – carry decimals)

11 points

QUESTION 7

1. Complete the calculations showing your work listed from the previous table on the attached form. Use textbook formulas (not formulas found on line) SHOW YOUR WORK TO RECEIVE CREDIT. Post back response to this question.
   1. Attach File

10 points

QUESTION 8

1. The average age of accountants at Three Rivers Corp. is 27 years, with a standard deviation of 7 years; the average salary of the accountants is $34,000, with a standard deviation of $6200. Compute the Coefficient of Variations for age and salaries. State as a percent with one decimal place. CV(age) = %CV(Salaries) = %Which is more variable? (age or salaries)

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