In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students have a mean credit card balance higher than $3000. This figure was an all-time high and had increased 42% over the previous five years. Assume that a current study is being conducted to determine if it can be concluded that the mean credit card balance for undergraduate students has continued to increase compared to the report. They want to test to see if the balance for students in 2019 is higher than the balance for students in 2015. See the sample below of undergraduate students in 2015 and different undergraduate students in 2019. Undergraduate Credit Cards Students in 2015 Students in 2019 2500 3300 2200 5450 1500 8000 930 2000 5300 870 1150 250 2700 3000 3300 2200 What is the t-statistic for this t-test?
In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students have a
| Students in 2015 | Students in 2019 |
|---|---|
| 2500 | 3300 |
| 2200 | 5450 |
| 1500 | 8000 |
| 930 | 2000 |
| 5300 | 870 |
| 1150 | 250 |
| 2700 | 3000 |
| 3300 | 2200 |
What is the t-statistic for this t-test?
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