Using traditional methods it takes 102 hours to receive an advanced flying license. A new training technique using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique on 40 students and observed that they had a mean of 105 hours. Assume the population standard deviation is known to be 7. Is there evidence at the 0.02 level that the technique performs differently than the traditional method? A) Find the P-value of the test statistic. Round your answer to four decimal places. B) Identify the level of significance for the hypothesis test. C)Make the decision to reject or fail to reject the null hypothesis.
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Using traditional methods it takes 102 hours to receive an advanced flying license. A new training technique using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique on 40 students and observed that they had a mean of 105 hours. Assume the population standard deviation is known to be 7. Is there evidence at the 0.02 level that the technique performs differently than the traditional method?
A) Find the P-value of the test statistic. Round your answer to four decimal places.
B) Identify the level of significance for the hypothesis test.
C)Make the decision to reject or fail to reject the null hypothesis.
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