Question

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 to two decimal places.

Answer #1

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.

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...

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 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 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...

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 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 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 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...

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