1. REACH Computer Resource Center
CIS 250 Test 1 Review
REACH
Computer Resource Center

2. Take the Sample Test on Blackboard!
Practice Test
Take the Sample Test on Blackboard!
More than half of the questions will be formatted similar to the practice test, quizzes and in-class problems.
You can take Sample Test 1 multiple times, although the score you earn will not count towards your final grade in CIS250Test 1 questions will be quite similar.
This assessment can be found in the Tests folder on Blackboard.
Raise your hand if you know about the practice test on blackboard.
Everyone should take this practice test prior to the exam, because more than half of the questions come straight from these examples. There will be different numbers on the test, but similar concepts. You can take the practice test as many times as you would like.

3. In This Review Session…
We will go over:
Excel Formulas
Relative, Absolute, and Mixed Cell references
Basic Functions – AVERAGE, SUM, COUNT, COUNTA, COUNTBLANK, MAX, MEDIAN
Practice Problems
Excel Short Cuts
This is what we will be going over today…

4. Absolute, Mixed and Relative
For a formula being copied:
If the reference is:
It changes to:
$A$1 (absolute column and absolute row)
$A$1 (the reference is absolute)
A$1 (relative column and absolute row)
C$1 (the reference is mixed)
$A1 (absolute column and relative row)
$A3 (the reference is mixed)
A1 (relative column and relative row)
C3 (the reference is relative)
This chart helps explain Absolute, Mixed and Relative References. Where we place the “$” Dollar Sign changes how a cell is referenced when a formula is copied from one cell to the next. If the dollar sign is placed BEFORE the column or row (In this case A and 1) the formula for that column or row will not change. In the first example, a dollar sign is place before “A” and before “1”, so the formula will not change when copied into C3. This reference is absolute, because nothing changes. When the dollar sign is placed only in from of the “1”, The A changes to C, but the “1” stays the same. Because the column changes but the row does not, this is called a “mixed” reference. In the final example, there is no dollar sign present, so the row and column will change when copied. This is a relative reference.

5. Shortcuts Cut item and store selection in the clipboard Ctrl + x
Copy item and store selection in the clipboard
Ctrl + C
Paste item from clipboard into designated cell
Ctrl + v
Erases the last change done to the worksheet, reverting it to an older state
Ctrl + z
Redo the last action done to the worksheet
Ctrl + y
Save workbook with a *.xlsx or *.xls file extension
Ctrl + s
Manually recalculates worksheet, including updating date and time functions
 F9
Copy the Active Dialog Box or screen image to the clipboard
Alt + PrntScr
Open Task Manager in Windows to see which programs are running
Ctrl + Shift + Esc
Toggles between Relative, Absolute, and Mixed cell references
 F4
Manually opens the Help menu
 F1

6. PEMDAS Order of Operations Parentheses and other grouping symbols
Exponents
Multiplication and division from left to right
Addition and subtraction from left to right
Excel treats multiplication and division as well as addition and subtraction as equal, evaluating from left to right

7. Percentages 5% = .05 100% = 1 140% = 1.4 How do you find 16% of 92?
=.16*92
Percentages in Excel are stored as fixed decimal values, but displayed in a percentage format

8. Quiz Question
(Excel) Assume that cell F4 in a spreadsheet has the following formula: =B$4+$C4 What formula will result from copying it into cell G5?
=C$4+$C5
Read the Question, give them some time to think about it. Then hit space and tell them the answer

9. Quiz Question
Which of the following should be used to refer to the cell reference AB$88?
a. Invalid  
b. Absolute 
c. Mixed 
d. Relative 
e. None of the above

10. Quiz Question
If the formula: =C$4*$H is copied from cell A3 to cell D5, what formula will appear in D5?
Answers:
=F$4*$H10
=F$4 * $H10

11. Quiz Question
What formula could you use to add up cell A1 from three worksheets named Sheet1, Sheet2, and Sheet3?
=SUM(Sheet1:Sheet3!A1)
=Sheet1!A1+Sheet2!A1+Sheet3!A1

12. Quiz Question Addition and subtraction 4 Exponentiation 2
Using a scale of 1 to 4 (first to last), rank each of the following operations in order of precedence:
Addition and subtraction -
Exponentiation
()parenthesis
Multiplication and division
Addition and subtraction 4
Exponentiation 2
()parenthesis 1
Multiplication and division 3
Explain this is PEMDAS. Please Excuse MY Dear Aunt Sally. This is the order of operations the formula bar will use.

13. Quiz Question
Write a formula to determine the number of bits that are needed to store the acronym "CRC" (without the quote marks).
=3*8
=8*3

14. =AVERAGE(number1, [number2],...)
The AVERAGE function
Syntax:
=AVERAGE(number1, [number2],...)
Arguments:
number1 Required
The first number, cell reference, or range for which you want the average.
number2, ... Optional
Additional numbers, cell references or ranges for which you want the average, up to a maximum of 255.
According to your professors, there are only two functions you need to know for the test. The first one is AVERAGE (Explain this slide briefly, there is an in depth explanation on the next slide)

15. The AVERAGE function Description: Remarks: Errors:
Returns the average (arithmetic or statistical mean) of the arguments.
Remarks:
Arguments can either be numbers or names, ranges, or cell references that contain numbers.
Logical values and text representations of numbers that you type directly into the list of arguments are counted.
Errors:
Arguments that are error values or text that cannot be translated into numbers cause errors.
Read the description, then give your explanation of what the AVERAGE Function.

16. The AVERAGE function Example: Average of the numbers in a column
Here is what it looks like. The range is from A2 to A6. So, this formula is calculated by Adding up 10, 7, 9, 27, 2, and dividing by the amount of numbers, which is 5. The numbers add up to 55, and when divided by 5 we get 11.
Example: Average of the numbers in a column

17. The SUM function Syntax:
=SUM(number1, [number2], [number3], [number4], ...)
Arguments:
number1 Required
The first item that you want to add.
number2, number3, number4, ... Optional
The remaining items that you want to add, up to a total of 255 items.
The 2nd function you have to know is the SUM function. This is how the SUM function is set up….
Microsoft® Excel® Mathematical Functions

18. Microsoft® Excel® Mathematical Functions
The SUM function
Description:
Adds all the numbers that you specify as arguments.
Remarks:
Each argument can be a range, a cell reference, an array, a constant, a formula, or the result from another function.
If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, or text in the array or reference are ignored.
Errors:
If any arguments are error values, or if any arguments are text that cannot be translated into numbers, Excel displays an error.
Read the description, and then explain it in your own words.
Microsoft® Excel® Mathematical Functions

19. Microsoft® Excel® Mathematical Functions
The SUM function
Here is how it can look. Notice both the SUM and AVERAGE functions can be used without cell references and just with numbers also, which is the case here.
Microsoft® Excel® Mathematical Functions

20. Quiz Question
Write a formula to calculate the average speed of all drivers listed in the table.
=AVERAGE(D5:D9)

21. Quiz Question
What formula would you write to perform each of the following?
Add a range of numbers stored in cells A3 through Z3
=SUM(A3:Z3)
Find the arithmetic mean of the values in cells C1 through C10, assuming any blank cells will be ignored
=AVERAGE(C1:C10)

22. Quiz Question
What is the Average value of the numbers in the highlighted array (or range)?
=AVERAGE(B9:D14)
Answer:
9.5
Notice there are several answers that are allowed. Go to EXCEL from here to better explain it.

23. Quiz Question
The dimensions of a storage tank for Killer Whales at SeaWorld is 50ft x 50ft x 20ft. If saltwater weighs approximately 60 pounds per cubic foot, write a formula to calculate the weight of the tank at full capacity.
Answers:
=50*50*20*60
=50^2*20*60
=50 * 50 * 20 * 60
=50^2 * 20 * 60

24. Quiz Question
When entered into a worksheet cell, all of the following are considered to be constant values, except:
A) Friend
B) =A9*B10
C) 210
D) CIS300
As A9 and B10 change, the cell with the formula A9*B10 will also change, thus creating an inconsistent value

25. Quiz Question
Mac and Farva need 40 liters of cola for an upcoming frat party. They notice the two grocery stores near them have drastically different prices for liters. One grocery sells liters for $1.20 per liter. Another has a sale going on, “Buy 10 Liters of Cola for only $5”. Assuming they were going to purchase all 40 at the same grocery, write a formula that would calculate the potential savings if they choose the cheaper option.
=( ) * 40
=(1.20- (5/10)) * 40

26. =COUNT(value1, [value2],...)
The COUNT function
Syntax:
=COUNT(value1, [value2],...)
Arguments:
value1 Required
The first item, cell reference, or range within which you want to count numbers.
value2, ... Optional
Up to 255 additional items, cell references, or ranges within which you want to count numbers.

27. The COUNT function Description: Remarks: Errors:
Counts the number of cells that contain numbers, and counts numbers within the list of arguments.
Remarks:
Arguments that are numbers, dates, or a text representation of numbers (for example, a number enclosed in quotation marks, such as "1") are counted.
Logical values and text representations of numbers that you type directly into the list of arguments are counted.
Arguments that are error values or text that cannot be translated into numbers are not counted.
If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, text, or error values in the array or reference are not counted.
Errors:
None

28. The COUNT function
Example: Counting the number of cells that contain numbers. Note that the third formula also adds the value 2 to get the result.

29. Quiz Question
How many unique cells are included in the array (or range) that is referenced in the following formula?
=COUNT(B9:D14)
Answers: 18
=18
eighteen
Notice there are several answers that are allowed. Go to EXCEL from here to better explain it. Type in B9:D14 into the formula bar, and count one by one the number of cells. B, C, D, is 3. 9, 10, 11, 12, 13, 14 is 6. 6x3 is 18.

30. =COUNTA(value1, [value2],...)
The COUNTA function
Syntax:
=COUNTA(value1, [value2],...)
Arguments:
value1 Required
The first argument representing the values that you want to count.
value2, ... Optional
Additional arguments representing the values that you want to count, up to a maximum of 255 arguments.

31. The COUNTA function Description:
Counts the number of cells that are not empty in a range.
Remarks:
Counts cells containing any type of information, including error values and empty text ("“).
The COUNTA function does not count empty cells.
Errors:
None

32. The COUNTA function
Example: Counting the number of cells with any information in a certain range.
=COUNTA(A1:A8) =7

33. The COUNTBLANK function
Syntax:
=COUNTBLANK(value1, [value2],...)
Arguments:
value1 Required
The first argument representing the values that you want to count.
value2, ... Optional
Additional arguments representing the values that you want to count, up to a maximum of 255 arguments.

34. The COUNTBLANK function
Description:
Counts the number of cells that are empty in a range.
Remarks:
Counts cells containing no information, and are completely blank
The COUNTBLANK function does not count cells that include errors, text, or formulas.
Errors:
None

35. The COUNTBLANK function
Example: Counting the number of cells with no information in a certain range.
=COUNTBLANK(A1:A8) =1

36. =MAX(number1,[number2],...)
The MAX function
Syntax:
=MAX(number1,[number2],...)
Arguments:
number1, number2, ... Required
1 to 255 numbers for which you want to find the maximum value.
Description:
Shows the largest value in a given range.

37. The MAX function
Example: Finding the largest number in a column. You can also add numbers to the data by adding it after a comma in the function.

38. =MIN(number1,[number2],...)
The MIN function
Syntax:
=MIN(number1,[number2],...)
Arguments:
number1, number2, ... Required
1 to 255 numbers for which you want to find the minimum value.
Description:
Shows the smallest value in a range.

39. The MIN function
Example: Finding the smallest number in a data set.

40. Other functions
MEDIAN - Returns the number in the middle of a set of the given numbers
=MEDIAN(Number1, {Number2}, …)
MODE - Returns the most frequently occurring, or repetitive, value in an array or range of data
=MODE(number1,[number2],...)

41. Helpful Hints Don’t forget an “=” when you are asked for a formula.
Rows vs. Columns Trick
Remember there are sometimes several correct ways to write the same answer!
Do not ignore the TiA content. It is a good portion of the test. Study Definitions!
Retake the practice test and re-practice the homework.

42. THANK YOU FOR VISITING CIS 250 TEST REVIEW SESSION
Any questions?
If there are any topics not covered or questions you have, PLEASE ask. We can’t help if we don’t know where you need help.
THANK YOU FOR VISITING CIS 250 TEST REVIEW SESSION