Difference between the mean responses between males and females

Is there a difference between the mean responses between males and females for:
Current GPA: The difference base on the t-test that we ran show that there in not much of a difference between male and females GPA that were involved in this survey with them both being right around 3.43 for males and 3.45 for females
Amount Expected to Spend on Textbook: Based on our t-test ran to find out the difference males and females were willing or expected to pay for the textbook for the class we found there were some differences. With males to pay an average of $98.47 and females willing to pay an average of $109.62, we see that there is a notable difference in the average of about $10-$11.

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