Question

Using traditional methods it takes 94.094.0 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 on 7070 students and observed that they had a mean of 92.092.0 hours. Assume the standard deviation is known to be 6.06.0. Is there evidence at the 0.050.05 level that the technique performs differently than the traditional method?

Step 1 of 5:

Enter the hypotheses:

Using traditional methods it takes 94.094.0 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 on 7070 students and observed that they had a mean of 92.092.0 hours. Assume the standard deviation is known to be 6.06.0. Is there evidence at the 0.050.05 level that the technique performs differently than the traditional method?

Step 2 of 5:

Enter the value of the z test statistic. Round your answer to two decimal places.

Using traditional methods it takes 94.094.0 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 on 7070 students and observed that they had a mean of 92.092.0 hours. Assume the standard deviation is known to be 6.06.0. Is there evidence at the 0.050.05 level that the technique performs differently than the traditional method?

Step 3 of 5:

Specify if the test is one-tailed or two-tailed.

Step 4 of 5:

Enter the decision rule.

Step 5 of 5:

Enter the conclusion.

Answer #1

Using traditional methods, it takes 94 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 80 students and observed that they had a mean of 92
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. Is there
sufficient evidence to support the...

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....

Using traditional methods, it takes 103 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 120 students and observed that they had a mean of
104 hours. Assume the variance is known to be 25. A level of
significance of 0.05 will be used to determine if the technique
performs differently than the traditional method. Is there
sufficient evidence to support the claim...

Using traditional methods, it takes 11.8 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 13 students and observed that they had a mean of
11.9 hours with a standard deviation of 1.2. A level of
significance of 0.1 will be used to determine if the technique
performs differently than the traditional method. Assume the
population distribution is approximately normal. State the null...

Using traditional methods, it takes 11.3 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 29 students and observed that they had a mean of
11.2 hours with a standard deviation of 1.1. A level of
significance of 0.05 will be used to determine if the technique
performs differently than the traditional method. Assume the
population distribution is approximately normal. State the null...

Using traditional methods, it takes 10.5 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 10 students and observed that they had a mean of
10.2 hours with a standard deviation of 1.3. A level of
significance of 0.1 will be used to determine if the technique
performs differently than the traditional method. Assume the
population distribution is approximately normal. State the null...

Using traditional methods, it takes 10.5 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 10 students and observed that they had a mean of
10.2 hours with a standard deviation of 1.3. A level of
significance of 0.1 will be used to determine if the technique
performs differently than the traditional method. Assume the
population distribution is approximately normal. State the null...

Using traditional methods, it takes 8.6 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 11 students and observed that they had a mean of 8.8
hours with a standard deviation of 1.7. A level of significance of
0.05 will be used to determine if the technique performs
differently than the traditional method. Assume the population
distribution is approximately normal. Make the decision...

Using traditional methods, it takes 9.5 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 15 students and observed that they had a mean of
10.0 hours with a standard deviation of 1.6. A level of
significance of 0.1 will be used to determine if the technique
performs differently than the traditional method. Assume the
population distribution is approximately normal. Make the decision...

Using traditional methods it takes 9292 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 7070 students and observed that they had a mean of
9393 hours. Assume the population variance is known to be 3636. Is
there evidence at the 0.050.05 level that the technique lengthens
the training time?
Step 1 of 6 :
State the null and alternative hypotheses.

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