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- https://stats.libretexts.org/Courses/Cerritos_College/Introduction_to_Statistics_with_R/16%3A_Research_Design/16.03%3A_Data_CollectionMost statistical analyses require that your data be in numerical rather than verbal form (you can’t punch letters into your calculator). Therefore, data collected in verbal form must be coded so that ...Most statistical analyses require that your data be in numerical rather than verbal form (you can’t punch letters into your calculator). Therefore, data collected in verbal form must be coded so that it is represented by numbers.
- https://stats.libretexts.org/Courses/Cerritos_College/Introduction_to_Statistics_with_R/20%3A_Case_Studies_and_Data/20.02%3A_FlatulenceThe purpose of this study was to find out whether or not people are embarrassed by their flatulence. Would you believe that women produce more of the bad smelling stuff than men do, and that women are...The purpose of this study was to find out whether or not people are embarrassed by their flatulence. Would you believe that women produce more of the bad smelling stuff than men do, and that women are more likely to complain to their doctors about the smell of their flatulence? The data in this research is self report data, and because the topic is sensitive some people may have been less than honest about their reported flatulence.
- https://stats.libretexts.org/Courses/Cerritos_College/Introduction_to_Statistics_with_R/08%3A_Estimating_Unknown_Quantities_from_a_Sample/8.E%3A_Estimation_(Exercises)What is the difference in the computation of a confidence interval between cases in which you know the population standard deviation and cases in which you have to estimate it? (relevant section & rel...What is the difference in the computation of a confidence interval between cases in which you know the population standard deviation and cases in which you have to estimate it? (relevant section & relevant section) True/false: As the sample size gets larger, the probability that the confidence interval will contain the population mean gets higher. (relevant section & relevant section)
- https://stats.libretexts.org/Courses/Cerritos_College/Introduction_to_Statistics_with_R/20%3A_Case_Studies_and_Data/20.14%3A_TV_ViolenceIn a survey of University of Houston-Downtown students, parents reported their children's age, characteristic behavior, and television viewing habits. This contributes to some lack of true variability...In a survey of University of Houston-Downtown students, parents reported their children's age, characteristic behavior, and television viewing habits. This contributes to some lack of true variability in responses because participants tended to report similar behavior for each child. Longitudinal Relations Between Children's Exposure to TV Violence and their Aggressive and Violent Behavior in Young Adulthood: 1977-1992.
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/05%3A_Sampling_DistributionsThe concept of a sampling distribution is perhaps the most basic concept in inferential statistics. It is also a difficult concept because a sampling distribution is a theoretical distribution rather ...The concept of a sampling distribution is perhaps the most basic concept in inferential statistics. It is also a difficult concept because a sampling distribution is a theoretical distribution rather than an empirical distribution. The introductory section defines the concept and gives an example for both a discrete and a continuous distribution. It also discusses how sampling distributions are used in inferential statistics.
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/14%3A_Case_Studies/14.22%3A_School_Gardens_and_Vegetable_ConsumptionThis study investigated the impact of participating in a school garden program on the ability to identify, willingness to taste, preference for, and consumption of vegetables. With this type of design...This study investigated the impact of participating in a school garden program on the ability to identify, willingness to taste, preference for, and consumption of vegetables. With this type of design, there is a greater chance that the intervention and control groups might differ at the outset of the study in ways that could bias the results of the study.
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/14%3A_Case_Studies/14.08%3A_ADHD_TreatmentChildren were given various dosages of a drug, methylphenidate (MPH) and then completed this task as part of a larger battery of tests. This task, adapted from the preschool delay task of the Gordon D...Children were given various dosages of a drug, methylphenidate (MPH) and then completed this task as part of a larger battery of tests. This task, adapted from the preschool delay task of the Gordon Diagnostic System (Gordon, 1983), measures the ability to suppress or delay impulsive behavioral responses. The DOG differentiates children with and without ADHD of normal intelligence (e.g., Mayes et al., 2001), and is sensitive to MPH treatment in these children (Hall & Kataria, 1992).
- https://stats.libretexts.org/Courses/American_River_College/STAT_300%3A_My_Introductory_Statistics_Textbook_(Mirzaagha)/02%3A_Descriptive_Statistics/2.02%3A_Graphing_Distributions/2.2.03%3A_Stem_and_Leaf_DisplaysA stem and leaf display is a graphical method of displaying data. It is particularly useful when your data are not too numerous. In this section, we will explain how to construct and interpret this ki...A stem and leaf display is a graphical method of displaying data. It is particularly useful when your data are not too numerous. In this section, we will explain how to construct and interpret this kind of graph.
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/03%3A_Summarizing_Distributions/3.E%3A_Summarizing_Distributions_(Exercises)True/False: When plotted on the same graph, a distribution with a mean of \(50\) and a standard deviation of \(10\) will look more spread out than will a distribution with a mean of \(60\) and a stand...True/False: When plotted on the same graph, a distribution with a mean of \(50\) and a standard deviation of \(10\) will look more spread out than will a distribution with a mean of \(60\) and a standard deviation of \(5\). (relevant section) If the mean time to respond to a stimulus is much higher than the median time to respond, what can you say about the shape of the distribution of response times? (relevant section)
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/07%3A_Estimation/7.09%3A_Confidence_Interval_SimulationFor each run of the simulation, \(100\) sample experiments are conducted and a confidence interval on the mean is computed for each experiment. If the \(95\%\) confidence interval contains the populat...For each run of the simulation, \(100\) sample experiments are conducted and a confidence interval on the mean is computed for each experiment. If the \(95\%\) confidence interval contains the population mean of \(50\), then the confidence interval is shown as an orange line. The \(95\%\) confidence intervals that contain the mean of \(50\) are shown in orange and the those that do not are shown in red.
- https://stats.libretexts.org/Courses/Luther_College/Psyc_350%3ABehavioral_Statistics_(Toussaint)/03%3A_Summarizing_Distributions/3.10%3A_Comparing_MeasuresTypically the trimean and trimmed mean will fall between the median and the mean, although in this case, the trimmed mean is slightly lower than the median. If you answered with the mode of \(\$250,00...Typically the trimean and trimmed mean will fall between the median and the mean, although in this case, the trimmed mean is slightly lower than the median. If you answered with the mode of \(\$250,000\) or the median of \(\$500,000\), you would not be giving any indication that some players make many millions of dollars. When the various measures differ, our opinion is that you should report the mean, median, and either the trimean or the mean trimmed \(50\%\).
