Descriptive statistics (Analysis ToolPak) in Excel - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ data_output

intermediate

Output of Descriptive Statistics Summary

You use the Analysis ToolPak in Excel to generate descriptive statistics for a dataset of 10 numbers: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20. What is the value of the Mean shown in the output?

A 12

B 10

C 11

D 9

💡 Hint

The mean is the average of all numbers added together divided by the count.

The sum of the numbers is 110. Dividing by 10 gives a mean of 11.

🧠 Conceptual

intermediate

Understanding Output Options in Analysis ToolPak

Which of the following statistics is NOT included by default when you run Descriptive Statistics in Excel's Analysis ToolPak?

A Mean

B Confidence Interval

C Standard Error

D Sum

💡 Hint

Check which statistics are automatically generated and which require extra steps.

The confidence interval is not included by default in the Analysis ToolPak descriptive statistics output.

📊 Formula Result

advanced

Interpreting Skewness from Analysis ToolPak Output

You run descriptive statistics on a dataset and see the skewness value is -1.5. What does this indicate about the data distribution?

A The data is skewed to the left (negative skew)

B The data is skewed to the right (positive skew)

C The data has no outliers

D The data is symmetric with no skew

💡 Hint

Negative skewness means the tail is longer on one side.

A negative skewness value means the data distribution has a longer tail on the left side.

❓ visualization

advanced

Histogram Interpretation from Analysis ToolPak

You create a histogram using Analysis ToolPak for exam scores. The histogram shows most bars concentrated on the left side with a long tail to the right. What does this tell you about the exam scores?

A Most students scored high, with few low scores (negative skew)

B Scores have no variation

C Scores are evenly distributed

D Most students scored low, with few high scores (positive skew)

💡 Hint

Look at where the bars cluster and the direction of the tail.

A histogram with bars on the left and a tail to the right shows positive skew, meaning most scores are low with some high outliers.

🎯 Scenario

expert

Choosing Correct Output Range for Descriptive Statistics

You have data in Excel from cells B2 to B21. You want to run Descriptive Statistics using Analysis ToolPak and output the results starting at cell D2. Which of the following steps correctly sets the input and output ranges?

A Input Range: B2:B21, Output Range: D2

B Input Range: B2:B20, Output Range: D2:D10

C Input Range: B1:B21, Output Range: D2

D Input Range: B2:B21, Output Range: D2:D15

💡 Hint

Input range should include all data cells. Output range is a single cell where output starts.

The input range must cover all data points (B2:B21). The output range is a single cell (D2) where the results will be placed.

Practice

1. What is the main purpose of using the Descriptive Statistics tool in Excel's Analysis ToolPak?

easy

A. To quickly summarize data with measures like mean and standard deviation

B. To create complex charts and graphs

C. To sort data alphabetically

D. To filter data based on conditions

Solution

1. Step 1: Understand the function of Descriptive Statistics tool

   This tool calculates summary numbers like mean, median, mode, variance, and standard deviation.

2. Step 2: Compare with other options

   Options B, C, and D describe other Excel features, not descriptive statistics.

3. Final Answer:

   To quickly summarize data with measures like mean and standard deviation -> Option A

4. Quick Check:

   Descriptive statistics = summary numbers [OK]

Hint: Descriptive stats = summary numbers like average and spread [OK]

Common Mistakes:

• Confusing descriptive statistics with chart creation
• Thinking it sorts or filters data
• Assuming it performs data entry or formatting

2. Which of the following is the correct way to start the Descriptive Statistics tool in Excel's Analysis ToolPak?

easy

A. Go to Data tab -> Data Analysis -> Select Descriptive Statistics -> Input range -> Check Summary statistics

B. Go to Insert tab -> PivotTable -> Select Descriptive Statistics

C. Go to Home tab -> Conditional Formatting -> Descriptive Statistics

D. Go to Review tab -> Protect Sheet -> Descriptive Statistics

Solution

1. Step 1: Recall the steps to access Descriptive Statistics

   It is accessed via Data tab -> Data Analysis -> Descriptive Statistics.

2. Step 2: Verify the input and options

   You must select the input range and check the box for summary statistics.

3. Final Answer:

   Go to Data tab -> Data Analysis -> Select Descriptive Statistics -> Input range -> Check Summary statistics -> Option A

4. Quick Check:

   Data tab + Data Analysis = Descriptive Statistics [OK]

Hint: Data Analysis tool is under Data tab, not Insert or Home [OK]

Common Mistakes:

• Looking for Descriptive Statistics under Insert or Home tabs
• Not enabling Analysis ToolPak add-in first
• Skipping the Summary statistics checkbox

3. Given the data in cells A1:A5 as 5, 7, 7, 10, 12, what is the mean value shown by the Descriptive Statistics tool?

medium

A. 7.2

B. 8.2

C. 8.0

D. 7.0

Solution

1. Step 1: Calculate the sum of the data

   Sum = 5 + 7 + 7 + 10 + 12 = 41

2. Step 2: Divide sum by number of values

   Mean = 41 / 5 = 8.2

3. Final Answer:

   8.2 -> Option B

4. Quick Check:

   (5+7+7+10+12)/5 = 8.2 [OK]

Hint: Mean = sum of values ÷ count of values [OK]

Common Mistakes:

• Adding incorrectly or missing a number
• Dividing by wrong count (e.g., 4 instead of 5)
• Confusing mean with median or mode

4. You used the Descriptive Statistics tool but the output shows an error or no results. Which of these is the most likely cause?

medium

A. You used the wrong font in the worksheet

B. You forgot to select the output range

C. You did not enable the Developer tab

D. The input range includes empty cells or text values

Solution

1. Step 1: Check input data validity

   Descriptive Statistics requires numeric data; empty or text cells cause errors.

2. Step 2: Review other options

   Output range selection is optional; Developer tab and font do not affect results.

3. Final Answer:

   The input range includes empty cells or text values -> Option D

4. Quick Check:

   Non-numeric input causes errors [OK]

Hint: Ensure input range has only numbers, no blanks or text [OK]

Common Mistakes:

• Including blank or text cells in input range
• Confusing output range with input range
• Thinking Developer tab is needed for Analysis ToolPak

5. You have sales data for 12 months in cells B2:B13. You want to find the mean, median, mode, and standard deviation quickly using the Analysis ToolPak. Which steps should you follow?

hard

A. Insert tab -> Chart -> Select B2:B13 -> Choose Descriptive Statistics -> OK

B. Formulas tab -> Insert Function -> Select Descriptive Statistics -> Input B2:B13 -> OK

C. Data tab -> Data Analysis -> Descriptive Statistics -> Input Range B2:B13 -> Check Summary statistics -> Choose Output Range -> OK

D. Review tab -> Protect Sheet -> Select B2:B13 -> Descriptive Statistics -> OK

Solution

1. Step 1: Access Descriptive Statistics via Data Analysis

   Go to Data tab, click Data Analysis, then select Descriptive Statistics.

2. Step 2: Set input range and options

   Input range is B2:B13, check Summary statistics, select output range, then click OK.

3. Final Answer:

   Data tab -> Data Analysis -> Descriptive Statistics -> Input Range B2:B13 -> Check Summary statistics -> Choose Output Range -> OK -> Option C

4. Quick Check:

   Data Analysis + Summary statistics = descriptive stats [OK]

Hint: Use Data Analysis tool, select input and check summary stats [OK]

Common Mistakes:

• Trying to find Descriptive Statistics under Insert or Formulas tabs
• Not checking Summary statistics box
• Not selecting correct input range