1. The mean is the best choice to measure central tendency of this dataset: 1, 4

Question

1. The mean is the best choice to measure central tendency of this dataset: 1, 4, 6, 8, 25, 100

True

False

2. A confidence interval is a range of values likely to include the true population value for a statistic.

True

False

3. The standard normal distribution and t-distributions are both bell-shaped, symmetric and centered at zero.

True

False

4. The standard error of the sample mean is smaller for the sample with the larger number of observations.

True

False

5. After an ANOVA test is complete the researcher knows exactly which population means are different.

True

False

Explanation / Answer

a) It is false because of present of two extreme values like 25 and 100

b) It is false. confidence interval is a range of values likely to include the true population value for a parameter.

c) It is true. Both are bell-shaped, symmetric and centered at zero.

d) It is True. standard error of the sample mean is smaller for the sample with the larger number of observations.

5) It is false. They need to to do post ad hoc test

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