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Q 1/5
Score 0
Which of the following statements is INCORRECT?
90
In conducting a hypothesis test, we need to specify the critical region. When the sample mean falls into the critical region, the hypothesized value for the population mean is very far from the value supported by data. We reject the hypothesized value.
In conducting a hypothesis test, when the sample mean is outside the critical region, there is not sufficient evidence to reject the null hypothesis. The null hypothesis can still be wrong.
In conducting a hypothesis test, we need to know the true population mean
In conducting a hypothesis test, we need to state a hypothesized population mean. This hypothesized value may or may not be equal to the true population mean.
Q 2/5
Score 0
Which of the following statements is INCORRECT?
90
p-value can be used when the significance level is 5%, but cannot be used when the significance level is 10%
p-value is the probability of observing a test statistic that is as extreme or more extreme than the currently observed test statistic under the assumption that the null hypothesis is correct.
When p-value is lower than the significance level, we reject the null hypothesis
p-value is equal to the significance level when the critical value is equal to the test statistic
