diff --git a/README.md b/README.md
index 5e71484..714b626 100644
--- a/README.md
+++ b/README.md
@@ -41,21 +41,6 @@ $ python main.py
 
 ### Sample Output:
 ```
-====== End Balance Table 500 Runs ======
-     start_balance  contribution  end_balance  average_return
-0             1000        250000     530956.0        4.860000
-1             1000        250000    5340032.0       12.386531
-2             1000        250000    4630970.0        9.062449
-3             1000        250000     998079.0        4.510000
-4             1000        250000     826731.0        7.439388
-..             ...           ...          ...             ...
-495           1000        250000    1861456.0        9.094082
-496           1000        250000    5137429.0       12.177347
-497           1000        250000     748437.0        6.220408
-498           1000        250000    1839859.0        7.693673
-499           1000        250000    2431553.0        7.890612
-
-[500 rows x 4 columns]
 ====== End Balance Summary Table 500 Runs ======
        start_balance  contribution  end_balance  average_return
 count          500.0         500.0        500.0           500.0
@@ -157,5 +142,4 @@ The `test_summary.py` program reads every summary statistics csv file and verifi
 After each run of the experiment, the success rate is appended to the `success_rate.csv` file.  The file is created automatically if it does not exist.
 Running `main.py` 100 times will generate a single csv file containing 100 lines.
 
-The `test_success_rate.py` program will read the `success_rate.csv` file and verify the success rate's minimum and maximum values to be within an expected range.
-I choose to verify the min/smallest and max/largest values rather than the mean so the test more sensitive to changes in the experiment.
+The `test_success_rate.py` program will read the `success_rate.csv` file and verify the success rate's mean and standard deviation are within an expected range.
diff --git a/main.py b/main.py
index 50fa4ee..42826b5 100644
--- a/main.py
+++ b/main.py
@@ -72,8 +72,6 @@
 df_all_stats.round(4)
 
 # output End Balance summary table
-print("=" * 6 + " End Balance Table %s Runs " %(num_reps) + "=" * 6)
-print(df_all_stats)
 print("=" * 6 + " End Balance Summary Table %s Runs " %(num_reps) + "=" * 6)
 print(df_all_stats.describe().round(0))
 print("=" * 60)
diff --git a/test_success_rate.py b/test_success_rate.py
index 4a86f38..24eb433 100644
--- a/test_success_rate.py
+++ b/test_success_rate.py
@@ -10,11 +10,11 @@
 df_summary = df.describe()
 #print(df_summary)
 
-success_rate_min = df_summary.at['min', 2]
-success_rate_max = df_summary.at['max', 2]
+success_rate_mean = df_summary.at['mean', 2]
+success_rate_std = df_summary.at['std', 2]
 
-assert success_rate_min > .62, f"success rate min is too small, got {success_rate_min}"
-assert success_rate_min < .65, f"success rate min is too large, got {success_rate_min}"
+assert success_rate_mean > .66, f"success rate mean is too small, got {success_rate_mean}"
+assert success_rate_mean < .70, f"success rate mean is too large, got {success_rate_mean}"
 
-assert success_rate_max > .719, f"success rate max is too small, got {success_rate_max}"
-assert success_rate_max < .731, f"success rate max is too large, got {success_rate_max}"
+assert success_rate_std > .020, f"success rate std is too small, got {success_rate_std}"
+assert success_rate_std < .024, f"success rate std is too large, got {success_rate_std}"
diff --git a/test_summary.py b/test_summary.py
index 24dbb7c..0fab792 100644
--- a/test_summary.py
+++ b/test_summary.py
@@ -20,7 +20,7 @@
     assert end_balance_mean > 2100000, f"end balance mean is too small, got {end_balance_mean}"
     assert end_balance_mean < 3150000, f"end balance mean is too large, got {end_balance_mean}"
 
-    assert end_balance_std > 2160000, f"end balance std is too small, got {end_balance_std}"
+    assert end_balance_std > 2100000, f"end balance std is too small, got {end_balance_std}"
     assert end_balance_std < 8130000, f"end balance std is too large, got {end_balance_std}"
 
     assert average_return_mean > 7.4, f"average return mean is too small, got {average_return_mean}"