## x-bar (x̄), i.e., “standard error,” of a distribution is calculated by taking the population standard deviation and dividing it by the square root of 5 times n (where n is sample size).

17. Question 17 x-bar (x̄), i.e., “standard error,” of a distribution is calculated by taking the population standard deviation and dividing it by the square root of 5 times n…

## Results obtained from larger sample sizes are more reliable.

13. Question 13 Results obtained from larger sample sizes are more reliable. 1 point   True   False

## The change in daily price of a stock is what type of variable?

3. Question 3 The change in daily price of a stock is what type of variable? 1 point     Ordinal     Quantitative     Qualitative     Random…

## The dependent variable in a scatter plot is on the x-axis.

19. Question 19 The dependent variable in a scatter plot is on the x-axis. 1 point   True   False

## Based on the pie chart shown here, “other sources” made up a relatively smaller proportion of US electricity sources as compared to wood fuels.

17. Question 17 Based on the pie chart shown here, “other sources” made up a relatively smaller proportion of US electricity sources as compared to wood fuels. Figure 2: The…

## Pie charts are not as useful as bar graphs as they do not take into account all possible categories.

16. Question 16 Pie charts are not as useful as bar graphs as they do not take into account all possible categories. 1 point   True   False

## The number of measurements falling within a class interval is called the:

9. Question 9 The number of measurements falling within a class interval is called the: 1 point   Frequency   Cumulative sum   Height   Relative frequency

## When we wish to summarize the proportion (or fraction) of items in a class we use the frequency distribution for each class.

7. Question 7 When we wish to summarize the proportion (or fraction) of items in a class we use the frequency distribution for each class. 1 point   True  …

## Which of the following is a categorical variable?

2. Question 2 Which of the following is a categorical variable? 1 point   Bank account balance   Daily sales in a store   Whether a person has a college…

## Nominal variables are:

1. Question 1 Nominal variables are: 1 point   Categorical without implying order   Numerical and can be multiplied and divided   Categorical and can be ordered   Numerical and…