4. According to Google's Personal Data Tracker 2000, the typical American spends 154.8

minutes per day on their phone, with a standard deviation of 34.6 minutes. A survey of

50 random GCC students independently results in a mean time of 128.7 minutes per

day on their phone, with a standard deviation of 46.5 minutes. Conduct the

appropriate test to determine if GCC students spend less time on their phones at the

α = 0.05 level of significance.