Researchers conducted a study on the effectiveness of coupons in increasing visits to a grocery store.

The experiment was conducted using 100 individuals; 50 individuals were randomly assigned to receive coupons offering 10% off certain items at Cityville Grocery Store. The remaining 50 individuals were assigned to receive coupons offering 20% off these items.

After receiving the coupons, the individuals' shopping habits were observed over the following week. The study found that the group with the 20% off coupons visited Cityville Grocery Store significantly more times than the group with the 10% off coupons.

Which of the following conclusions can be made about this result?