Math 1342 Sample Test 1 printable pdf download

Math 1342 Sample Test 1

Sample Test 1 - Math 1342

Each question is worth 7 points. Your results, plots and comments will be typed into Microsoft Word and

then either submitted to the D2L dropbox as a Word File or as a pdf file.

The following data shows the number of grams per serving of 30 different cakes

1. Enter the data into StatCrunch and create a summary statistics table. Remember your data must go

down column 1 (var1) Paste your table into your Word document. You can use the default selection that

StatCrunch uses but also include the IQR as well.

2. Use StatCrunch to create a Stem and Leaf plot and paste it into your Word document.

3. Looking at the Summary Statistics and the Stem and Leaf plot why does the median have a fractional

part and not a whole number when all of the numbers in the data are whole numbers? What are the

two numbers on each side of the median?

4. Use StatCrunch to create a Box Plot which goes side to side (not up and down) and paste it into your

Word document. Is the median equally spaced between Q1 and Q3? If not which one is it closer to?

5. Use your IQR to determine if the data has medium or extreme outliers. See page 176 question 18 in

the textbook.

6. Create a Grouped Frequency Table from the data using 5 classes. Make sure the width is an

odd

number

and complete the following table. Examples -> 4.3 rounds to w = 5, 7.3 rounds to w = 9

Class Class Limits

Class Boundaries

Frequency Midpoints Freq * Midpoints

Freq *Mid^2

7. Use the Grouped Frequency Table to calculate the grouped mean and compare this number with the

mean from your StatCrunch summary of the ungrouped data. Are the results the same or are they

different? Which answer do you think is more accurate and why?

Math 1342 Sample Test 1