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Using traditional methods, it takes 98 hours to receive a basic flying license. A new license...

Using traditional methods, it takes 98 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 210 students and observed that they had a mean of 97 hours. Assume the standard deviation is known to be 55. A level of significance of 0.01 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.

Math   Statistics-And-Probability   
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Answer #1

H0: = 98

Ha: 98

Test statistics

z = - / ( / sqrt(n) )

= 97 - 98 / 55 / sqrt(210)

= 0.26

This is test statistics value.

Critical value at 0.01 level = -2.576 , 2.576

Since test statistics falls in non-rejection region, we fail to reject the null hypothesis.

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