Statistics Concepts Quiz

<p>Economics relies on statistics for national income accounts. (C)</p> Signup and view all the answers

<p>By adding all values and dividing by the number of values (B)</p> Signup and view all the answers

<p>It summarizes and represents the center of a data set. (C)</p> Signup and view all the answers

<p>Standard deviation (C)</p> Signup and view all the answers

<p>Personal fitness training (B)</p> Signup and view all the answers

<p>They can skew the mean significantly. (D)</p> Signup and view all the answers

<p>$𝑥̅ = \frac{𝛴𝑥}{𝑛}$ (D)</p> Signup and view all the answers

<p>It allows for a straightforward comparison of average values. (C)</p> Signup and view all the answers

<p>29.875 years (B)</p> Signup and view all the answers

<p>It can be significantly distorted by them. (A)</p> Signup and view all the answers

<p>It is the balance point of the sample values. (C)</p> Signup and view all the answers

<p>60.63 hours/month (B)</p> Signup and view all the answers

<p>It is calculated in the same way as the sample mean. (A)</p> Signup and view all the answers

<p>10 (C)</p> Signup and view all the answers

<p>By averaging the two middle ranked values (B)</p> Signup and view all the answers

<p>21 (D)</p> Signup and view all the answers

<p>Identifying the fourth position value from an arranged list (A)</p> Signup and view all the answers

<p>There can be multiple modes in a data set. (D)</p> Signup and view all the answers

<p>Finding the middle two positions after arranging the data in ascending order (C)</p> Signup and view all the answers

<p>117.5 (A)</p> Signup and view all the answers

<p>All values in the set are unique. (C)</p> Signup and view all the answers

<p>There was an even number of entries in the set. (D)</p> Signup and view all the answers

<p>133.0 (D)</p> Signup and view all the answers

<p>8 (C)</p> Signup and view all the answers

<p>121.5 (A)</p> Signup and view all the answers

<p>17 (D)</p> Signup and view all the answers

<p>133.5 (C)</p> Signup and view all the answers

<p>4 (A)</p> Signup and view all the answers

<p>10 (A)</p> Signup and view all the answers

<p>Blue was worn significantly more than any other color. (A)</p> Signup and view all the answers

<p>Mode as it highlights the most frequently occurring number. (B)</p> Signup and view all the answers

<p>Matthew, with multiple instances of high and low attendance. (A)</p> Signup and view all the answers

<p>Rose had the least frequency of attendance based on mode analysis. (B)</p> Signup and view all the answers

<p>Blue, with 11 occurrences leading the data. (D)</p> Signup and view all the answers

<p>Blue, as it had the highest wear frequency. (A)</p> Signup and view all the answers

<p>Ben, maintaining a similar range throughout the year. (C)</p> Signup and view all the answers

<p>Blue was preferred, being worn significantly more than others. (A)</p> Signup and view all the answers

<p>The highest value minus the lowest value in the distribution (C)</p> Signup and view all the answers

<p>It indicates the distance between the lower and upper class limits. (C)</p> Signup and view all the answers

<p>Add the upper and lower class limits and divide by 2 (C)</p> Signup and view all the answers

<p>Cumulative Frequency (D)</p> Signup and view all the answers

<p>The month with the highest mean of movies watched (C)</p> Signup and view all the answers

<p>By averaging the medians of the number of movies seen in each month (B)</p> Signup and view all the answers

<p>Class limits are defined purely by their frequency count. (D)</p> Signup and view all the answers

<p>Normal distribution (B)</p> Signup and view all the answers

Techniques used to summarize and describe characteristics of a data set. Used to present data in reports, summaries etc.

Techniques used to make predictions, comparisons, and conclusions about a population from a sample of that population.

The average of a set of numbers. Calculated by summing all numbers and dividing by the total count.

A single value that represents the center of a data set.

The middle value in a sorted dataset.

The most frequent value in a dataset.

The entire group of individuals or items of interest.

A part of the population used to make inferences about the larger population.

The average of a subset of data (a sample) from a larger population.

The average of all values in a complete data set (the entire population).

Symbol representing the sample mean.

Symbol representing the population mean.

Add all the values in the data set; then, divide the total by the number of values.

A central measure used to represent a data set’s typical value, and useful in comparing data sets

Significant (large or small) values in data set affect the mean.

The central value in a sorted dataset. For odd datasets, it's the middle value. For even datasets, it's the average of the two middle values.

For odd datasets, the median is calculated as the (n+1)/2-th ranked value in the sorted data.

For even datasets, the median is the average of the (n/2)-th and (n/2 + 1)-th ranked values.

Resistant to extreme values. Outliers don't significantly affect the median's value.

In the data (1, 2, 3, 3, 4, 4, 4, 5), the mode is 4 because it occurs most often.

A dataset can have multiple modes if several values occur equally frequently.

If all values in a dataset appear only once, there is no mode.

The data collected in its original form (untouched and unprocessed).

The difference between the highest and lowest values in a dataset.

Organizes data into mutually exclusive classes and displays the frequency (counts) of each class.

The distance between the lower and upper limits of a class in a frequency distribution table.

The smallest and largest observations within each class.

The specific values that separate one class from another in a frequency distribution table. It's calculated by adding 0.5 to the upper limit and subtracting 0.5 from the lower limit of a class.

The average of the upper and lower class limits. It's also known as the class mark.

The number of times a value appears in a specific class of a frequency distribution table.

A dataset with two values that occur most frequently, making it have two modes.

Adding all values in a dataset then dividing by the total number of values.

Uni-modal: One mode. Bi-modal: Two modes.

Explaining the meaning of the mean, median, and mode in relation to the dataset.

Outliers can significantly pull the mean towards themselves, making it less representative of the data.

It tells us the most frequent value in a dataset, offering insights into common occurrences or preferences.

The smallest value that can belong to a particular class interval in a frequency distribution table.

The largest value that can belong to a particular class interval in a frequency distribution table.

The average of the upper and lower class limits.

The average value of a data set grouped into classes. It's calculated by summing the products of each class midpoint and its frequency, then dividing by the total frequency.

A way to organize data by grouping values into classes and showing how often each class occurs.

A collection of individual data points.