Question

Using traditional methods it takes 107 hours to receive an advanced driving license. A new training technique using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique on 190 students and observed that they had a mean of 108 hours. Assume the population standard deviation is known to be 6. Is there evidence at the 0.05 level that the technique lengthens the training time?

Find the value of the test statistic. Round to two decimal places. Specify is the test is one-tailed or two-tailed. Find the P-value of the test statistic. Identify the level of significance for the hypothesis test. Make the decision to reject or fail to reject the null hypothesis.

Answer #1

Using traditional methods it takes 107 hours to receive an
advanced flying license. A new training technique using Computer
Aided Instruction (CAI) has been proposed. A researcher believes
the new technique may lengthen training time and decides to perform
a hypothesis test. After performing the test on 120 students, the
researcher decides to reject the null hypothesis at a 0.10 level of
significance. What is the conclusion?

Using traditional methods it takes 93 hours to receive an
advanced driving license. A new training technique using Computer
Aided Instruction (CAI) has been proposed. A researcher believes
the new technique may lengthen training time and decides to perform
a hypothesis test. After performing the test on 180 students, the
researcher decides to reject the null hypothesis at a 0.10 level of
significance.
What is the conclusion?

Using traditional methods it takes 105 hours to receive an
advanced driving license. A new training technique using Computer
Aided Instruction (CAI) has been proposed. A researcher used the
technique on 150 students and observed that they had a mean of 104
hours. Assume the population standard deviation is known to be 5.
Is there evidence at the 0.05 level that the technique performs
differently than the traditional method?
Step 1 of 6: State the null and alternative hypotheses.
Step...

Using traditional methods it takes 91 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 70 students and observed that they had a mean of 92
hours. Assume the population variance is known to be 25. Is there
evidence at the 0.02 level that the technique lengthens the
training time?
Step 1 of 6: State the null and alternative hypotheses.
Step 2 of 6:...

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 110 students and observed that they had a mean of 104
hours. Assume the population variance is known to be 49. Is there
evidence at the 0.02 level that the technique lengthens the
training time?
Step 2 of 6 : Find the value of the test statistic.
Round your answer...

xUsing traditional methods it takes 103 hours to receive an
advanced driving license. A new training technique using Computer
Aided Instruction (CAI) has been proposed. A researcher believes
the new technique may reduce training time and decides to perform a
hypothesis test. After performing the test on 170 students, the
researcher fails to reject the null hypothesis at a 0.10 level of
significance. What is the conclusion?
A. There is not sufficient evidence at the 0.10 level of
significance that...

Using traditional methods it takes 8.6 hours to receive a basic
driving license. A new license training method using Computer Aided
Instruction (CAI) has been proposed. A researcher used the
technique on 22 students and observed that they had a mean of 9.0
hours with a variance of 1.96. Is there evidence at the 0.01
level that the technique lengthens the training time? Assume the
population distribution is approximately normal.
Step 1 of 5: State the null and alternative hypotheses....

Using traditional methods it takes 93 hours to receive an
advanced driving 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 91
hours. Assume the population variance is known to be 25. Is there
evidence at the 0.05 level that the technique performs differently
than the traditional method? Step 2 of 6: Find the value of the
test statistic. Round...

Using traditional methods it takes 101 101 hours to receive an
advanced flying license. A new training technique using Computer
Aided Instruction (CAI) has been proposed. A researcher believes
the new technique may reduce training time and decides to perform a
hypothesis test. After performing the test on 190 190 students, the
researcher decides to reject the null hypothesis at a 0.05 0.05
level of significance. What is the conclusion?
There IS sufficient evidence. ?
There is Not sufficient evidence?

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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