Using traditional methods, it takes 92 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 70 students and observed that they had a mean of 93 hours. Assume the standard deviation is known to be 6. A level of significance of 0.05 will be used to determine if the technique performs differently than the traditional method. Find the value of the test statistic. Round your answer to 2 decimal places. Enter the value of the test statistic.
Solution :
Test statistic = z
= ( - ) / / n
= (93 - 92) / 6 / 70
= 1.39
Test statistic = 1.39
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