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- https://math.libretexts.org/Courses/Fullerton_College/Math_100%3A_Liberal_Arts_Math_(Claassen_and_Ikeda)/08%3A_Describing_Data/8.05%3A_Box_PlotsIn addition to the mean and median, which are measures of the "typical" or "middle" value, we also need a measure of how "spread out" or varied each data set is. There are several ways to measure thi...In addition to the mean and median, which are measures of the "typical" or "middle" value, we also need a measure of how "spread out" or varied each data set is. There are several ways to measure this "spread" of the data.
- https://math.libretexts.org/Courses/Chabot_College/Math_in_Society_(Zhang)/10%3A_Descriptive_Statistics/10.09%3A_Presenting_Quantitative_Data_GraphicallyNotice that in the histogram, a bar represents values on the horizontal axis from that on the left hand-side of the bar up to, but not including, the value on the right hand side of the bar. The data ...Notice that in the histogram, a bar represents values on the horizontal axis from that on the left hand-side of the bar up to, but not including, the value on the right hand side of the bar. The data below came from a task in which the goal is to move a computer mouse to a target on the screen as fast as possible. A frequency polygon starts out like a histogram, but instead of drawing a bar, a point is placed in the midpoint of each interval at height equal to the frequency.
- https://math.libretexts.org/Courses/Chabot_College/Math_in_Society_(Zhang)/10%3A_Descriptive_Statistics/10.04%3A_Sampling_methodsThe first thing we should do before conducting a survey is to identify the population that we want to study.
- https://math.libretexts.org/Courses/Chabot_College/Math_in_Society_(Zhang)/10%3A_Descriptive_Statistics/10.11%3A_Measures_of_Central_Tendency\[\begin{array}{ll} \text{There are 6 data values of \$15, so} & \text{Values 1 to } 6 \text{ are \$15 thousand } \\ \text{The next 8 data values are \$20, so } & \text{Values 7 to } (6+8)=14 \text{ a...\[\begin{array}{ll} \text{There are 6 data values of \$15, so} & \text{Values 1 to } 6 \text{ are \$15 thousand } \\ \text{The next 8 data values are \$20, so } & \text{Values 7 to } (6+8)=14 \text{ are \$20 thousand} \\ \text{The next 11 data values are \$25, so} & \text{ Values 15 to } (14+11)=25 \text{ are \$25 thousand} \\ \text{The next 17 data values are \$30, so} & \text{Values 26 to } (25+17)=42 \text{ are \$30 thousand} \\ \text{The next 19 data values are \$35, so} & \text{Values 43 t…
- https://math.libretexts.org/Courses/Chabot_College/Math_in_Society_(Zhang)/10%3A_Descriptive_Statistics/10.13%3A_Exercises\(\begin{array}{|l|l|l|l|l|l|l|l|l|l|l|l|} The bar graph to the right shows the number of adults who indicated each number of children. Referring to the boxplot above, what percentage of actuaries mak...\(\begin{array}{|l|l|l|l|l|l|l|l|l|l|l|l|} The bar graph to the right shows the number of adults who indicated each number of children. Referring to the boxplot above, what percentage of actuaries makes more than the median salary of a CPA? Of interest is the average length of time in months patients live once starting the treatment. A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard deviation of 4.
- https://math.libretexts.org/Courses/Las_Positas_College/Math_for_Liberal_Arts/14%3A_Descriptive_Statistics/14.01%3A_Organizing_and_Visualizing_DataWhile the pie chart accurately depicts the relative size of the people agreeing with each candidate, the chart is confusing, since usually percents on a pie chart represent the percentage of the pie t...While the pie chart accurately depicts the relative size of the people agreeing with each candidate, the chart is confusing, since usually percents on a pie chart represent the percentage of the pie the slice represents. Notice that in the histogram, a bar represents values on the horizontal axis from that on the left hand-side of the bar up to, but not including, the value on the right hand side of the bar.
- https://math.libretexts.org/Courses/Fullerton_College/Math_100%3A_Liberal_Arts_Math_(Claassen_and_Ikeda)/07%3A_Statistics/7.02%3A_Sampling_MethodsThe first thing we should do before conducting a survey is to identify the population that we want to study.
- https://math.libretexts.org/Courses/Chabot_College/Math_in_Society_(Zhang)/10%3A_Descriptive_Statistics/10.07%3A_ExerciseIdentify the most relevant source of bias in this situation: A study seeks to investigate whether a new pain medication is safe to market to the public. Find a newspaper or magazine article, or the on...Identify the most relevant source of bias in this situation: A study seeks to investigate whether a new pain medication is safe to market to the public. Find a newspaper or magazine article, or the online equivalent, describing the results of a recent study (the results of a poll are not sufficient). Give a summary of the study’s findings, then analyze whether the article provided enough information to determine the validity of the conclusions.
- https://math.libretexts.org/Bookshelves/Applied_Mathematics/Math_in_Society_(Lippman)/10%3A_StatisticsStatistics are often presented in an effort to add credibility to an argument or advice. You can see this by paying attention to television advertisements. Many of the numbers thrown about in this way...Statistics are often presented in an effort to add credibility to an argument or advice. You can see this by paying attention to television advertisements. Many of the numbers thrown about in this way do not represent careful statistical analysis. They can be misleading, and push you into decisions that you might find cause to regret. These chapters will help you learn statistical essentials. It will make you into an intelligent consumer of statistical claims.
- https://math.libretexts.org/Courses/Northwest_Florida_State_College/MGF_1131%3A_Mathematics_in_Context/01%3A_Organizing_Data/1.04%3A_How_to_mess_things_up_before_you_startThere are number of ways that a study can be ruined before you even start collecting data. The first we have already explored – sampling or selection bias, which is when the sample is not representati...There are number of ways that a study can be ruined before you even start collecting data. The first we have already explored – sampling or selection bias, which is when the sample is not representative of the population. One example of this is voluntary response bias, which is bias introduced by only collecting data from those who volunteer to participate. This is not the only potential source of bias.
- https://math.libretexts.org/Bookshelves/Applied_Mathematics/Math_in_Society_(Lippman)/11%3A_Describing_Data/11.02%3A_Presenting_Categorical_Data_GraphicallyCategorical, or qualitative, data are pieces of information that allow us to classify the objects under investigation into various categories.
