Question

A significant difference is one that is so great that it has a high probability of...

A significant difference is one that is so great that it has a high probability of having occurred by chance .

Group of answer choices

True

False

Using a difference level of significance could change the decision to fail or fail to reject the null hypothesis.

Group of answer choices

True

False

An instructor wanted to evaluate a specific method of instruction. He knows that the average score for statistics students over the past 5 years has been an 82. The standard deviation for this population of students is 18. After a semester of using this new method of instruction for 20 sample students, the instructor determines that the mean for this sample class of students is 88. The level of significance is 0.05. Should you reject or fail to reject the null hypothesis?

Group of answer choices

Fail to reject

Reject

Redo

hypotheswhat?

An instructor wanted to evaluate a specific method of instruction. He knows that the average score for statistics students over the past 5 years has been an 82. The standard deviation for this population of students is 18. After a semester of using this new method of instruction for 20 sample students, the instructor determines that the mean for this sample class of students is 88. The level of significance is 0.05. Calculate the Z-score used to determine whether or not you should accept or reject the null hypothesis.

Group of answer choices

0.05

1.96

1.49

1.8

Math   Statistics-And-Probability   
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