variance of at least 25 points. A recent sample of 40 exams has a sample standard deviation of 4.31. Test whether or not her goal was achieved. Is this enough evidence at the 10% level of significance, to continue assuming the teacher's claim is valid? Calculate the appropriate test statistic (round to 2 decimal places as needed) Determine the appropriate critical value (round to 3 decimal places as needed) Determine the p-value (round to 4 decimal places as needed) Which of the following is your conclusion based on the information above: O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a population variance of at least 25 points. The sample evidence is different enough from the teacher's claim to state her claim is not valid. There is a 10% risk that this decision is incorrect. Do not reject the null hypothesis. There is insufficient evidence to reject the teacher's claim that the population variance of at least 25 points. The sample evidence does not differ enough from the her claim, so continue to assume her claim is valid. O Do not reject the null hypothesis. There is insufficient evidence to support the teacher's claim of a population variance of at least 25 points. This proves that the teacher's claim is valid. O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a
variance of at least 25 points. A recent sample of 40 exams has a sample standard deviation of 4.31. Test whether or not her goal was achieved. Is this enough evidence at the 10% level of significance, to continue assuming the teacher's claim is valid? Calculate the appropriate test statistic (round to 2 decimal places as needed) Determine the appropriate critical value (round to 3 decimal places as needed) Determine the p-value (round to 4 decimal places as needed) Which of the following is your conclusion based on the information above: O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a population variance of at least 25 points. The sample evidence is different enough from the teacher's claim to state her claim is not valid. There is a 10% risk that this decision is incorrect. Do not reject the null hypothesis. There is insufficient evidence to reject the teacher's claim that the population variance of at least 25 points. The sample evidence does not differ enough from the her claim, so continue to assume her claim is valid. O Do not reject the null hypothesis. There is insufficient evidence to support the teacher's claim of a population variance of at least 25 points. This proves that the teacher's claim is valid. O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Suppose that on a 100-point test, the teacher's goal is for her students' exam scores to have a
variance of at least 25 points. A recent sample of 40 exams has a sample standard deviation
of 4.31. Test whether or not her goal was achieved.
Is this enough evidence at the 10% level of significance, to continue assuming the teacher's
claim is valid?
Calculate the appropriate test statistic (round to 2 decimal places as needed)
Determine the appropriate critical value (round to 3 decimal places as needed)
Determine the p-value (round to 4 decimal places as needed)
Which of the following is your conclusion based on the information above:
O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a
population variance of at least 25 points. The sample evidence is different enough from
the teacher's claim to state her claim is not valid. There is a 10% risk that this decision is
incorrect.
O Do not reject the null hypothesis. There is insufficient evidence to reject the teacher's
claim that the population variance of at least 25 points. The sample evidence does not
differ enough from the her claim, so continue to assume her claim is valid.
O Do not reject the null hypothesis. There is insufficient evidence to support the teacher's
claim of a population variance of at least 25 points. This proves that the teacher's claim
is valid.
O Reject the null hypothesis. There is sufficient evidence to reject the teacher's claim of a
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